1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2020 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <https://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
12 * Unicode 12.1.0 Support: Character encoding, character type info, and
13 transliteration tables are all updated to Unicode 12.1.0, using
14 generator scripts contributed by Mike FABIAN (Red Hat).
16 * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
18 * The GNU C Library now loads audit modules listed in the DT_AUDIT and
19 DT_DEPAUDIT dynamic section entries of the main executable.
21 Deprecated and removed features, and other changes affecting compatibility:
23 * The deprecated <sys/sysctl.h> header and the sysctl function have been
24 removed. To support old binaries, the sysctl function continues to
25 exist as a compatibility symbol (on those architectures which had it),
26 but always fails with ENOSYS. This reflects the removal of the system
27 call from all architectures, starting with Linux 5.5.
29 Changes to build and runtime requirements:
31 [Add changes to build and runtime requirements here]
33 Security related changes:
35 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
36 corruption when they were passed a pseudo-zero argument. Reported by Guido
37 Vranken / ForAllSecure Mayhem.
39 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
40 out-of-bounds write when executed in a signal frame context.
42 CVE-2020-1752: A use-after-free vulnerability in the glob function when
43 expanding ~user has been fixed.
45 The following bugs are resolved with this release:
47 [The release manager will add the list generated by
48 scripts/list-fixed-bugs.py just before the release.]
54 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
55 enable features from the draft ISO C2X standard. Only some features from
56 this draft standard are supported by the GNU C Library, and as the draft
57 is under active development, the set of features enabled by this macro is
58 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
59 by compiling with "gcc -std=gnu2x".
61 * The <math.h> functions that round their results to a narrower type now
62 have corresponding type-generic macros in <tgmath.h>, as defined in TS
63 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
64 Clarification Request 13 to TS 18661-3.
66 * The function pthread_clockjoin_np has been added, enabling join with a
67 terminated thread with a specific clock. It allows waiting against
68 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
70 * New locale added: mnw_MM (Mon language spoken in Myanmar).
72 * The DNS stub resolver will optionally send the AD (authenticated data) bit
73 in queries if the trust-ad option is set via the options directive in
74 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
75 mode, the AD bit, as provided by the name server, is available to
76 applications which call res_search and related functions. In the default
77 mode, the AD bit is not set in queries, and it is automatically cleared in
78 responses, indicating a lack of DNSSEC validation. (Therefore, the name
79 servers and the network path to them are treated as untrusted.)
81 Deprecated and removed features, and other changes affecting compatibility:
83 * The totalorder and totalordermag functions, and the corresponding
84 functions for other floating-point types, now take pointer arguments to
85 avoid signaling NaNs possibly being converted to quiet NaNs in argument
86 passing. This is in accordance with the resolution of Clarification
87 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
88 floating-point arguments directly will continue to work.
90 * The obsolete function stime is no longer available to newly linked
91 binaries, and its declaration has been removed from <time.h>.
92 Programs that set the system time should use clock_settime instead.
94 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
95 in a future version of glibc. In this release, the header still exists
96 but calling ftime will cause a compiler warning. All programs should use
97 gettimeofday or clock_gettime instead.
99 * The gettimeofday function no longer reports information about a
100 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
101 many years, as it cannot handle the full complexity of the world's
102 timezones, but hitherto we have supported it on a best-effort basis.
103 Changes required to support 64-bit time_t on 32-bit architectures have
104 made this no longer practical.
106 As of this release, callers of gettimeofday with a non-null 'tzp' argument
107 should expect to receive a 'struct timezone' whose tz_minuteswest and
108 tz_dsttime fields are zero. (For efficiency reasons, this does not always
109 happen on a few Linux-based ports. This will be corrected in a future
112 All callers should supply a null pointer for the 'tzp' argument to
113 gettimeofday. For accurate information about the time zone associated
114 with the current time, use the localtime function.
116 gettimeofday itself is obsolescent according to POSIX. We have no plans
117 to remove access to this function, but portable programs should consider
118 using clock_gettime instead.
120 * The settimeofday function can still be used to set a system-wide time
121 zone when the operating system supports it. This is because the Linux
122 kernel reused the API, on some architectures, to describe a system-wide
123 time-zone-like offset between the software clock maintained by the kernel,
124 and the "RTC" clock that keeps time when the system is shut down.
126 However, to reduce the odds of this offset being set by accident,
127 settimeofday can no longer be used to set the time and the offset
128 simultaneously. If both of its two arguments are non-null, the call
129 will fail (setting errno to EINVAL).
131 Callers attempting to set this offset should also be prepared for the call
132 to fail and set errno to ENOSYS; this already happens on the Hurd and on
133 some Linux architectures. The Linux kernel maintainers are discussing a
134 more principled replacement for the reused API. After a replacement
135 becomes available, we will change settimeofday to fail with ENOSYS on all
136 platforms when its 'tzp' argument is not a null pointer.
138 settimeofday itself is obsolescent according to POSIX. Programs that set
139 the system time should use clock_settime and/or the adjtime family of
140 functions instead. We may cease to make settimeofday available to newly
141 linked binaries after there is a replacement for Linux's time-zone-like
144 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
145 the optional CAS instruction is implemented (for instance, LEON processors
146 are still supported, but SuperSPARC processors are not).
148 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
151 * If a lazy binding failure happens during dlopen, during the execution of
152 an ELF constructor, the process is now terminated. Previously, the
153 dynamic loader would return NULL from dlopen, with the lazy binding error
154 captured in a dlerror message. In general, this is unsafe because
155 resetting the stack in an arbitrary function call is not possible.
157 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
158 executable stack unless explicitly configured at build time to require
159 minimum kernel version 4.8 or newer. This is because executing
160 floating-point branches on a non-executable stack on Linux kernels prior to
161 4.8 can lead to application crashes for some MIPS configurations. While
162 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
163 expected to enable non-executable stack by default with PT_GNU_STACK by
164 default and is thus likely to trigger a crash on older kernels.
166 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
167 non-executable stack while dropping support for older kernels.
169 * System call wrappers for time system calls now use the new time64 system
170 calls when available. On 32-bit targets, these wrappers attempt to call
171 the new system calls first and fall back to the older 32-bit time system
172 calls if they are not present. This may cause issues in environments
173 that cannot handle unsupported system calls gracefully by returning
174 -ENOSYS. Seccomp sandboxes are affected by this issue.
176 Changes to build and runtime requirements:
178 * It is no longer necessary to have recent Linux kernel headers to build
179 working (non-stub) system call wrappers on all architectures except 64-bit
180 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
182 * The ChangeLog file is no longer present in the toplevel directory of the
183 source tree. ChangeLog files are located in the ChangeLog.old directory as
184 ChangeLog.N where the highest N has the latest entries.
186 Security related changes:
188 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
189 environment variable during program execution after a security
190 transition, allowing local attackers to restrict the possible mapping
191 addresses for loaded libraries and thus bypass ASLR for a setuid
192 program. Reported by Marcin KoĆcielnicki.
194 The following bugs are resolved with this release:
196 [12031] localedata: iconv -t ascii//translit with Greek characters
197 [15813] libc: Multiple issues in __gen_tempname
198 [17726] libc: [arm, sparc] profil_counter should be compat symbol
199 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
200 [19767] libc: vdso is not used with static linking
201 [19903] hurd: Shared mappings not being inherited by children processes
202 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
203 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
205 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
206 Symbols-A/B Unicode blocks
207 [23518] libc: Eliminate __libc_utmp_jump_table
208 [24026] malloc: malloc_info() returns wrong numbers
209 [24054] localedata: Many locales are missing date_fmt
210 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
211 [24304] dynamic-link: Lazy binding failure during ELF
212 constructors/destructors is not fatal
213 [24376] libc: RISC-V symbol size confusion with _start
214 [24682] localedata: zh_CN first weekday should be Monday per GB/T
216 [24824] libc: test-in-container does not install charmap files compatible
218 [24844] regex: regex bad pointer / leakage if malloc fails
219 [24867] malloc: Unintended malloc_info formatting changes
220 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
221 [24880] libc: login: utmp implementation uses struct flock with fcntl64
222 [24882] libc: login: pututline uses potentially outdated cache
223 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
224 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
226 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
228 [24930] dynamic-link: dlopen of PIE executable can result in
229 _dl_allocate_tls_init assertion failure
230 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
231 (stringop-overflow error)
232 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
233 functions other can lead to crashes
234 [24967] libc: jemalloc static linking causes runtime failure
235 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
237 [25035] libc: sbrk() failure handled poorly in tunables_strdup
238 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
239 [25097] libc: new -Warray-bounds with GCC 10
240 [25112] dynamic-link: dlopen must not make new objects accessible when it
241 still can fail with an error
242 [25139] localedata: Please add the new mnw_MM locale
243 [25149] regex: Array bounds violation in proceed_next_node
244 [25157] dynamic-link: Audit cookie for the dynamic loader is not
245 initialized correctly
246 [25189] libc: glibc's __glibc_has_include causes issues with clang
248 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
250 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
251 binaries (CVE-2019-19126)
252 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
254 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
256 [25232] string: <string.h> does not enable const correctness for strchr et
258 [25233] localedata: Consider "." as the thousands separator for sl_SI
260 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
261 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
262 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
264 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
265 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
267 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
268 (dl_initfirst) link map pointer
269 [25401] malloc: pvalloc must not have __attribute_alloc_size__
270 [25423] libc: Array overflow in backtrace on powerpc
271 [25425] network: Missing call to __resolv_context_put in
272 getaddrinfo.c:gethosts
279 * Unicode 12.1.0 Support: Character encoding, character type info, and
280 transliteration tables are all updated to Unicode 12.1.0, using
281 generator scripts contributed by Mike FABIAN (Red Hat).
283 * The dynamic linker accepts the --preload argument to preload shared
284 objects, in addition to the LD_PRELOAD environment variable.
286 * The twalk_r function has been added. It is similar to the existing
287 twalk function, but it passes an additional caller-supplied argument
288 to the callback function.
290 * On Linux, the getdents64, gettid, and tgkill functions have been added.
292 * Minguo (Republic of China) calendar support has been added as an
293 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
296 * The entry for the new Japanese era has been added for ja_JP locale.
298 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
299 pvalloc, memalign, and posix_memalign fail now with total object size
300 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
301 pointer subtraction within the allocated object, where results might
302 overflow the ptrdiff_t type.
304 * The dynamic linker no longer refuses to load objects which reference
305 versioned symbols whose implementation has moved to a different soname
306 since the object has been linked. The old error message, symbol
307 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
308 link time reference, is gone.
310 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
311 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
312 functions. These behave similarly to their "timed" equivalents, but also
313 accept a clockid_t parameter to determine which clock their timeout should
314 be measured against. All functions allow waiting against CLOCK_MONOTONIC
315 and CLOCK_REALTIME. The decision of which clock to be used is made at the
316 time of the wait (unlike with pthread_condattr_setclock, which requires
317 the clock choice at initialization time).
319 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
320 work, new resolvers can use a second argument which can be extended in
321 the future, currently it contains the AT_HWCAP2 value.
323 Deprecated and removed features, and other changes affecting compatibility:
325 * The copy_file_range function fails with ENOSYS if the kernel does not
326 support the system call of the same name. Previously, user space
327 emulation was performed, but its behavior did not match the kernel
328 behavior, which was deemed too confusing. Applications which use the
329 copy_file_range function can no longer rely on glibc to provide a fallback
330 on kernels that do not support the copy_file_range system call, and if
331 this function returns ENOSYS, they will need to use their own fallback.
332 Support for copy_file_range for most architectures was added in version
333 4.5 of the mainline Linux kernel.
335 * The functions clock_gettime, clock_getres, clock_settime,
336 clock_getcpuclockid, clock_nanosleep were removed from the librt library
337 for new applications (on architectures which had them). Instead, the
338 definitions in libc will be used automatically, which have been available
341 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
342 and <sys/stropts.h> have been removed.
344 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
345 resolver flag (deprecated in glibc 2.25) have been removed.
347 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
348 resolver have been removed from <resolv.h>.
350 * With --enable-bind-now, installed programs are now linked with the
353 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
354 configurations) has been removed, following the deprecation of this
355 subarchitecture in version 8 of GCC, and its removal in version 9.
357 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
358 header have been removed.
360 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
361 deprecated and will be removed from a future version of glibc.
362 Application should directly access /proc instead. For obtaining random
363 bits, the getentropy function can be used.
365 Changes to build and runtime requirements:
367 * GCC 6.2 or later is required to build the GNU C Library.
369 Older GCC versions and non-GNU compilers are still supported when
370 compiling programs that use the GNU C Library.
372 Security related changes:
374 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
375 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
376 has undefined behavior. On x32, the size_t argument may be passed
377 in the lower 32 bits of the 64-bit RDX register with non-zero upper
378 32 bits. When it happened with the sign bit of RDX register set,
379 memcmp gave the wrong result since it treated the size argument as
380 zero. Reported by H.J. Lu.
382 CVE-2019-9169: Attempted case-insensitive regular-expression match
383 via proceed_next_node in posix/regexec.c leads to heap-based buffer
384 over-read. Reported by Hongxu Chen.
386 The following bugs are resolved with this release:
388 [2872] locale: Transliteration Cyrillic -> ASCII fails
389 [6399] libc: gettid() should have a wrapper
390 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
391 [16976] glob: fnmatch unbounded stack VLA for collating symbols
392 [17396] localedata: globbing for locale by [[.collating-element.]]
393 [18035] dynamic-link: pldd does no longer work, enters infinite loop
394 [18465] malloc: memusagestat is built using system C library
395 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
396 invalid input drops valid char
397 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
398 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
399 [21897] localedata: Afar locales: Fix mon, abmon, and abday
400 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
401 [23352] malloc: __malloc_check_init still defined in public header
403 [23403] nptl: Wrong alignment of TLS variables
404 [23501] libc: nftw() doesn't return dangling symlink's inode
405 [23733] malloc: Check the count before calling tcache_get()
406 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
408 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
409 [23844] nptl: pthread_rwlock_trywrlock results in hang
410 [23983] argparse: Missing compat versions of argp_failure and argp_error
411 for long double = double
412 [23984] libc: Missing compat versions of err.h and error.h functions for
414 [23996] localedata: Dutch salutations
415 [24040] libc: riscv64: unterminated call chain in __thread_start
416 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
418 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
419 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
421 [24114] regex: regexec buffer read overrun in "grep -i
422 '\(\(\)*.\)*\(\)\(\)\1'"
423 [24122] libc: Segfaults if 0 returned from la_version
424 [24153] stdio: Some input functions do not react to stdin assignment
425 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
426 RDX is set) (CVE-2019-7309)
427 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
428 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
429 not the default "nor"
430 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
431 false positives, change to modern flexible array
432 [24180] nptl: pthread_mutex_trylock does not use the correct order of
433 instructions while maintaining the robust mutex list due to missing
435 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
436 unnecessary librt dependencies
437 [24200] localedata: Revert first_weekday removal in en_IE locale
438 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
439 [24215] nptl: pthread_timedjoin_np should be a cancellation point
440 [24216] malloc: Check for large bin list corruption when inserting
442 [24228] stdio: old x86 applications that use legacy libio crash on exit
443 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
445 [24293] localedata: Missing Minguo calendar support for TW locales
446 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
448 [24307] localedata: Update locale data to Unicode 12.0.0
449 [24323] dynamic-link: dlopen should not be able open PIE objects
450 [24335] build: "Obsolete types detected" with Linux 5.0 headers
451 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
453 [24370] localedata: Add lang_name for tt_RU locale
454 [24372] locale: Binary locale files are not architecture independent
455 [24394] time: strptime %Ey mis-parses final year of era
456 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
458 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
460 [24531] malloc: Malloc tunables give tcache assertion failures
461 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
463 [24535] localedata: Update locale data to Unicode 12.1.0
464 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
465 kernels and break testing
466 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
467 [24556] build: [GCC 9] error: â%sâ directive argument is null
468 [-Werror=format-overflow=]
469 [24570] libc: alpha: compat msgctl uses __IPC_64
470 [24584] locale: Data race in __wcsmbs_clone_conv
471 [24588] stdio: Remove codecvt vtables from libio
472 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
474 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
475 [24632] stdio: Old binaries which use freopen with default stdio handles
477 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
479 [24652] localedata: szl_PL spelling correction
480 [24695] nss: nss_db: calling getpwent after endpwent crashes
481 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
482 in /etc/nsswitch.conf
483 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
484 [24740] libc: getdents64 type confusion
485 [24741] dynamic-link: ld.so should not require that a versioned symbol is
486 always implemented in the same library
487 [24744] libc: Remove copy_file_range emulation
488 [24757] malloc: memusagestat is linked against system libpthread
489 [24794] libc: Partial test suite run builds corrupt test-in-container
497 * The getcpu wrapper function has been added, which returns the currently
498 used CPU and NUMA node. This function is Linux-specific.
500 * A new convenience target has been added for distribution maintainers
501 to build and install all locales as directories with files. The new
502 target is run by issuing the following command in your build tree:
503 'make localedata/install-locale-files', with an optional DESTDIR
504 to set the install root if you wish to install into a non-default
507 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
509 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
510 for _GNU_SOURCE, to match BSD environments.
512 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
513 indicates that it will abort the transaction prior to entering the kernel
514 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
515 suspended, and this caused some undefined side-effects issues by aborting
516 transactions manually. Glibc avoided it by abort transactions manually on
517 each syscall, but it lead to performance issues on newer kernels where the
518 HTM state is saved and restore lazily (the state being saved even when the
519 process actually does not use HTM).
521 * The functions posix_spawn_file_actions_addchdir_np and
522 posix_spawn_file_actions_addfchdir_np have been added, enabling
523 posix_spawn and posix_spawnp to run the new process in a different
524 directory. These functions are GNU extensions. The function
525 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
528 * The popen and system do not run atfork handlers anymore (BZ#17490).
529 Although it is a possible POSIX violation, the POSIX rationale in
530 pthread_atfork documentation regarding atfork handlers is to handle
531 inconsistent mutex state after a fork call in a multi-threaded process.
532 In both popen and system there is no direct access to user-defined mutexes.
534 * Support for the C-SKY ABIV2 running on Linux has been added. This port
535 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
537 - C-SKY ABIV2 soft-float little-endian
538 - C-SKY ABIV2 hard-float little-endian
540 * strftime's default formatting of a locale's alternative year (%Ey)
541 has been changed to zero-pad the year to a minimum of two digits,
542 like "%y". This improves the display of Japanese era years during
543 the first nine years of a new era, and is expected to be harmless
544 for all other locales (only Japanese locales regularly have
545 alternative year numbers less than 10). Zero-padding can be
546 overridden with the '_' or '-' flags (which are GNU extensions).
548 * As a GNU extension, the '_' and '-' flags can now be applied to
549 "%EY" to control how the year number is formatted; they have the
550 same effect that they would on "%Ey".
552 Deprecated and removed features, and other changes affecting compatibility:
554 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
555 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
557 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
558 in <sys/procfs.h>, has been corrected to match the type actually used by
559 the Linux kernel. This affects the size and layout of that structure on
560 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
562 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
563 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
564 defined in <sys/procfs.h>, has been corrected to match the type actually
565 used by the Linux kernel. This affects the size and layout of those
568 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
569 meant to scan a string and allocate space for it with malloc, is now
570 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
571 defined. This extension conflicts with C99's use of '%a' to scan a
572 hexadecimal floating-point number, which is now available to programs
573 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
575 POSIX.1-2008 includes the feature of allocating a buffer for string input
576 with malloc, using the modifier letter 'm' instead. Programs using
577 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
578 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
579 C99 '%a' no longer need to avoid _GNU_SOURCE.
581 GCC's -Wformat warnings can detect most uses of this extension, as long
582 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
583 __attribute__ ((format (scanf, ...))).
585 Changes to build and runtime requirements:
587 * Python 3.4 or later is required to build the GNU C Library.
589 * On most architectures, GCC 5 or later is required to build the GNU C
590 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
592 Older GCC versions and non-GNU compilers are still supported when
593 compiling programs that use the GNU C Library.
595 Security related changes:
597 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
598 denial of service due to resource exhaustion when processing getaddrinfo
599 calls with crafted host names. Reported by Guido Vranken.
601 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
602 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
603 happened, accessing the 32-bit size_t value as the full 64-bit register
604 in the assembly string/memory functions would cause a buffer overflow.
607 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
608 addresses with arbitrary trailing characters, potentially leading to data
609 or command injection issues in applications.
611 The following bugs are resolved with this release:
613 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
614 [10496] localedata: 12h time representation in multiple locales faulty
615 [10797] localedata: it_IT locale numeric does not have a separator for
617 [11319] libc: dprintf doesn't handle errors properly
618 [16346] time: mktime: potentially unsafe use of localtime_offset
619 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
621 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
622 posix_spawn_file_actions_addfchdir_np
623 [17426] localedata: Indian locales: set the correct date format
624 [17490] stdio: popen should not invoke atfork handlers
625 [17783] libc: TIOCSER_TEMT conditions inconsistent
626 [18040] regex: use-after-free in regexec/get_subexp
627 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
628 [20018] network: getaddrinfo should reject IP addresses with trailing
629 characters (CVE-2016-10739)
630 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
631 [20271] libc: Missing "\n" in __libc_fatal calls
632 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
633 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
634 pointer argument is non-NULL
635 [21037] stdio: open_memstream and freopen
636 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
637 [21716] time: Crash in glibc's mktime in low-memory situations
638 [22834] stdio: Subprocess forked by popen may crash in Linux when
639 multithreads call popen
640 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
641 and pthread_create fails.
642 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
643 [23125] libc: riscv64: endless loop when throwing an exception from a
645 [23275] nptl: Race in pthread_mutex_lock while promoting to
646 PTHREAD_MUTEX_ELISION_NP.
647 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
649 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
651 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
653 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
654 [23509] dynamic-link: CET enabled glibc is incompatible with the older
656 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
657 [23521] nss: get_next_alias nss_files file stream leak
658 [23538] nptl: Hang in pthread_cond_broadcast
659 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
660 [23578] regex: Invalid memory access if regex pattern contains NUL byte
661 [23579] libc: Errors misreported in preadv2
662 [23597] build: support/test-container.c doesn't work with different
664 [23603] time: mktime signed integer overflow on large timestamps
665 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
666 [23614] libc: powerpc: missing CFI register information in __mpn_*
668 [23637] string: Generic strstr/strcasestr fails with huge needles
669 [23640] libc: no way to easily clear FD_CLOEXEC in
670 posix_spawn_file_actions_adddup2()
671 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
673 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
675 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
676 [23689] libc: Bug in documentation for rusage.ru_ixrss in
677 bits/types/struct_rusage.h
678 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
680 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
682 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
683 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
684 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
686 [23724] localedata: Albanian date formats are incorrect
687 [23735] math: libnldbl_nonshared.a references internal libm symbols
688 [23740] localedata: kl_GL: Month names and date formats need update
689 [23744] regex: regex refactorings to remove BE, avoid duplication
690 [23745] time: mktime fix for Gnulib + coreutils
691 [23758] time: Improve the width of alternate representation for year in
693 [23783] libc: [mips] Missing CMSPAR bits/termios.h
694 [23789] time: mktime does not set errno on failure
695 [23791] localedata: Wrong monetary format for ca_ES locale
696 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
697 [23794] locale: c16rtomb does not handle surrogate pairs
698 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
699 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
700 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
701 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
702 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
703 [23862] libc: [sh] missing kernel-features.h undefines
704 [23864] libc: [riscv] missing kernel-features.h undefines
705 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
706 [23907] malloc: Incorrect double-free malloc tcache check disregards
708 [23913] libc: off-by-one in function maybe_script_execute in
709 sysdeps/posix/spawni.c
710 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
711 [23923] locale: Add --no-hard-links option to localedef
712 [23927] network: Linux if_nametoindex() does not close descriptor
714 [23961] math: powf can overflow to inf without setting errno in non-
715 nearest rounding mode
716 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
717 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
718 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
719 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
720 [24011] localedata: Fixed small type in comment for locale bs_BA
721 [24018] libc: gettext() may return NULL
722 [24022] build: riscv build failure with Linux kernel 4.20-rc7
723 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
724 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
726 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
727 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
729 [24046] localedata: en_US locale doesn't define date_fmt
730 [24063] manual: @var{errno} should be @code{errno}
731 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
732 [24088] libc: VSCR field is not being correctly read in ucontext_t on
734 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
736 [24097] string: Can't use 64-bit register for size_t in assembly codes for
738 [24110] hurd: SS_DISABLE never set in stack_t value returned by
740 [24112] network: Do not send DNS queries for non-host names (where all
741 answers will be rejected)
742 [24130] libc: alpha __remqu corrupts $f3 register
749 * The localization data for ISO 14651 is updated to match the 2016
750 Edition 4 release of the standard, this matches data provided by
751 Unicode 9.0.0. This update introduces significant improvements to the
752 collation of Unicode characters. This release deviates slightly from
753 the standard in that the collation element ordering for lowercase and
754 uppercase LATIN script characters is adjusted to ensure that regular
755 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
756 is not matched by [a-z]. With the update many locales have been
757 updated to take advantage of the new collation information. The new
758 collation information has increased the size of the compiled locale
759 archive or binary locales.
761 * The GNU C Library can now be compiled with support for Intel CET, AKA
762 Intel Control-flow Enforcement Technology. When the library is built
763 with --enable-cet, the resulting glibc is protected with indirect
764 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
765 compatible with all existing executables and shared libraries. This
766 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
767 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
768 capable of multi-byte NOPs, like x86-64 processors as well as Intel
769 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
770 x86_64 and x32 on non-CET processors. --enable-cet has been tested
771 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
774 * The GNU C Library now has correct support for ABSOLUTE symbols
775 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
776 relocated incorrectly or in some cases discarded. The GNU linker can
777 make use of the newer semantics, but it must communicate it to the
778 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
779 field) to indicate such support is required.
781 * Unicode 11.0.0 Support: Character encoding, character type info, and
782 transliteration tables are all updated to Unicode 11.0.0, using
783 generator scripts contributed by Mike FABIAN (Red Hat).
785 * <math.h> functions that round their results to a narrower type are added
786 from TS 18661-1:2014 and TS 18661-3:2015:
788 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
791 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
794 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
797 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
800 * Two grammatical forms of month names are now supported for the following
801 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
802 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
803 support two grammatical forms in abbreviated month names: Catalan, Greek,
806 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
807 include the support for two grammatical forms of month names.
809 * Building and running on GNU/Hurd systems now works without out-of-tree
812 * The renameat2 function has been added, a variant of the renameat function
813 which has a flags argument. If the flags are zero, the renameat2 function
814 acts like renameat. If the flag is not zero and there is no kernel
815 support for renameat2, the function will fail with an errno value of
816 EINVAL. This is different from the existing gnulib function renameatu,
817 which performs a plain rename operation in case of a RENAME_NOREPLACE
818 flags and a non-existing destination (and therefore has a race condition
819 that can clobber the destination inadvertently).
821 * The statx function has been added, a variant of the fstatat64
822 function with an additional flags argument. If there is no direct
823 kernel support for statx, glibc provides basic stat support based on
824 the fstatat64 function.
826 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
827 library if installed. libidn2 version 2.0.5 or later is recommended. If
828 libidn2 is not available, internationalized domain names are not encoded
829 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
830 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
831 with an encoding error.) Flags which used to change the IDN encoding and
832 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
833 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
834 deprecated. They no longer have any effect.
836 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
837 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
838 range of ELF gABI expressions including such constructs as
839 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
840 have been further restricted, and where in the past a dynamic string
841 token sequence may have been interpreted as a literal string it will
842 now cause a load failure. These load failures were always considered
843 unspecified behaviour from the perspective of the dynamic loader, and
844 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
845 results in a load failure now.
847 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
848 implementation includes all the standard functions provided by
851 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
852 thrd_detach, thrd_exit, and thrd_join for thread management.
854 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
855 mtx_destroy for mutual exclusion.
857 - call_once for function call synchronization.
859 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
860 cnd_wait for conditional variables.
862 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
864 Application developers must link against libpthread to use ISO C threads.
866 Deprecated and removed features, and other changes affecting compatibility:
868 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
869 installed. Software that was using either header should be updated to
870 use standard <stdio.h> interfaces instead.
872 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
873 This was never required by the C standard, and the macros just expanded
874 to call alternative names for the same functions. If you hoped getc and
875 putc would provide performance improvements over fgetc and fputc, instead
876 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
877 necessary, flockfile and funlockfile.
879 * All stdio functions now treat end-of-file as a sticky condition. If you
880 read from a file until EOF, and then the file is enlarged by another
881 process, you must call clearerr or another function with the same effect
882 (e.g. fseek, rewind) before you can read the additional data. This
883 corrects a longstanding C99 conformance bug. It is most likely to affect
884 programs that use stdio to read interactive input from a terminal.
887 * The macros 'major', 'minor', and 'makedev' are now only available from
888 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
889 headers that happen to include <sys/types.h>. These macros are rarely
890 used, not part of POSIX nor XSI, and their names frequently collide with
891 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
894 <sys/sysmacros.h> is a GNU extension. Portable programs that require
895 these macros should first include <sys/types.h>, and then include
896 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
898 * The tilegx*-*-linux-gnu configurations are no longer supported.
900 * The obsolete function ustat is no longer available to newly linked
901 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
902 function has been deprecated in favor of fstatfs and statfs.
904 * The obsolete function nfsservctl is no longer available to newly linked
905 binaries. This function was specific to systems using the Linux kernel
906 and could not usefully be used with the GNU C Library on systems with
907 version 3.1 or later of the Linux kernel.
909 * The obsolete function name llseek is no longer available to newly linked
910 binaries. This function was specific to systems using the Linux kernel
911 and was not declared in a header. Programs should use the lseek64 name
912 for this function instead.
914 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
915 getaddrinfo and getnameinfo functions have been deprecated. The behavior
916 previously selected by them is now always enabled.
918 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
919 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
920 restriction (rejecting '_' in host names, among other things) has been
921 removed, for increased compatibility with non-IDN name resolution.
923 * The fcntl function now have a Long File Support variant named fcntl64. It
924 is added to fix some Linux Open File Description (OFD) locks usage on non
925 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
926 fcntl and LFS support is handled transparently. Also for Linux, the OFD
927 locks act as a cancellation entrypoint.
929 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
930 ecb_crypt, and des_setparity are no longer available to newly linked
931 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
932 longer installed. These functions encrypted and decrypted data with the
933 DES block cipher, which is no longer considered secure. Software that
934 still uses these functions should switch to a modern cryptography library,
937 * Reflecting the removal of the encrypt and setkey functions above, the
938 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
939 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
942 * The obsolete function fcrypt is no longer available to newly linked
943 binaries. It was just another name for the standard function crypt,
944 and it has not appeared in any header file in many years.
946 * We have tentative plans to hand off maintenance of the passphrase-hashing
947 library, libcrypt, to a separate development project that will, we hope,
948 keep up better with new passphrase-hashing algorithms. We will continue
949 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
950 'crypt_r' should not need to change at all; however, distributions will
951 need to install <crypt.h> and libcrypt from a separate project.
953 In this release, if the configure option --disable-crypt is used, glibc
954 will not install <crypt.h> or libcrypt, making room for the separate
955 project's versions of these files. The plan is to make this the default
956 behavior in a future release.
958 Changes to build and runtime requirements:
960 GNU make 4.0 or later is now required to build glibc.
962 Security related changes:
964 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
965 been fixed by removing the glibc-internal IDNA implementation and using
966 the system-provided libidn2 library instead. Originally reported by Hanno
967 Böck and Christian Weisgerber.
969 CVE-2017-18269: An SSE2-based memmove implementation for the i386
970 architecture could corrupt memory. Reported by Max Horn.
972 CVE-2018-11236: Very long pathname arguments to realpath function could
973 result in an integer overflow and buffer overflow. Reported by Alexey
976 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
977 architecture could write beyond the target buffer, resulting in a buffer
978 overflow. Reported by Andreas Schwab.
980 The following bugs are resolved with this release:
982 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
983 [6889] manual: 'PWD' mentioned but not specified
984 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
985 when __WORDSIZE != 64
986 [13762] regex: re_search etc. should return -2 on memory exhaustion
987 [13888] build: /tmp usage during testing
988 [13932] math: dbl-64 pow unexpectedly slow for some inputs
989 [14092] nptl: Support C11 threads
990 [14095] localedata: Review / update collation data from Unicode / ISO
992 [14508] libc: -Wformat warnings
993 [14553] libc: Namespace pollution loff_t in sys/types.h
994 [14890] libc: Make NT_PRFPREG canonical.
995 [15105] libc: Extra PLT references with -Os
996 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
998 [16335] manual: Feature test macro documentation incomplete and out of
1000 [16552] libc: Unify umount implementations in terms of umount2
1001 [17082] libc: htons et al.: statement-expressions prevent use on global
1002 scope with -O1 and higher
1003 [17343] libc: Signed integer overflow in /stdlib/random_r.c
1004 [17438] localedata: pt_BR: wrong d_fmt delimiter
1005 [17662] libc: please implement binding for the new renameat2 syscall
1006 [17721] libc: __restrict defined as /* Ignore */ even in c11
1007 [17979] libc: inconsistency between uchar.h and stdint.h
1008 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
1009 [18023] libc: extend_alloca is broken (questionable pointer comparison,
1010 horrible machine code)
1011 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
1013 [18471] libc: llseek should be a compat symbol
1014 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
1016 [18991] nss: nss_files skips large entry in database
1017 [19239] libc: Including stdlib.h ends up with macros major and minor being
1019 [19463] libc: linknamespace failures when compiled with -Os
1020 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1021 [19527] locale: Normalized charset name not recognized by setlocale
1022 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1023 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1025 [19728] network: out of bounds stack read in libidn function
1026 idna_to_ascii_4i (CVE-2016-6261)
1027 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1028 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1029 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1031 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1032 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1033 [20419] dynamic-link: files with large allocated notes crash in
1035 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1036 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1037 [20980] manual: CFLAGS environment variable replaces vital options
1038 [21163] regex: Assertion failure in pop_fail_stack when executing a
1039 malformed regexp (CVE-2015-8985)
1040 [21234] manual: use of CFLAGS makes glibc detect no optimization
1041 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1042 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1043 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1044 [21508] locale: intl/tst-gettext failure with latest msgfmt
1045 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1046 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1047 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1049 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1051 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1052 [22247] network: Integer overflow in the decode_digit function in
1053 puny_decode.c in libidn (CVE-2017-14062)
1054 [22342] nscd: NSCD not properly caching netgroup
1055 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1056 [22550] localedata: es_ES locale (and other es_* locales): collation
1057 should treat ñ as a primary different character, sync the collation
1058 for Spanish with CLDR
1059 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1060 by gcc configured with --enable-default-pie
1061 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1062 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1063 crossing 2GB threshold (CVE-2017-18269)
1064 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1066 [22735] time: Misleading typo in time.h source comment regarding
1068 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1069 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1070 `__assert_perror_fail ()' to `__assert_fail_base ()'
1071 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1073 [22786] libc: Stack buffer overflow in realpath() if input size is close
1074 to SSIZE_MAX (CVE-2018-11236)
1075 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1076 through an absolute DT_NEEDED path
1077 [22792] build: tcb-offsets.h dependency dropped
1078 [22797] libc: pkey_get() uses non-reserved name of argument
1079 [22807] libc: PTRACE_* constants missing for powerpc
1080 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1081 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1082 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1083 [22848] localedata: ca_ES: update date definitions from CLDR
1084 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1085 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1086 [22896] localedata: Update locale data for an_ES
1087 [22902] math: float128 test failures with GCC 8
1088 [22918] libc: multiple common of `__nss_shadow_database'
1089 [22919] libc: sparc32: backtrace yields infinite backtrace with
1091 [22926] libc: FTBFS on powerpcspe
1092 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1094 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1095 [22947] libc: FAIL: misc/tst-preadvwritev2
1096 [22963] localedata: cs_CZ: Add alternative month names
1097 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1098 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1099 [22998] dynamic-link: execstack tests are disabled when SELinux is
1101 [23005] network: Crash in __res_context_send after memory allocation
1103 [23007] math: strtod cannot handle -nan
1104 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1105 [23036] regex: regex equivalence class regression
1106 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1107 [23069] libc: sigaction broken on riscv64-linux-gnu
1108 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1109 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1110 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1111 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1112 and libc build with -Os)
1113 [23140] localedata: More languages need two forms of month names
1114 [23145] libc: _init/_fini aren't marked as hidden
1115 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1116 [23171] math: C++ iseqsig for long double converts arguments to double
1117 [23178] nscd: sudo will fail when it is run in concurrent with commands
1118 that changes /etc/passwd
1119 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1121 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1122 [23208] localedata: New locale - Lower Sorbian (dsb)
1123 [23233] regex: Memory leak in build_charclass_op function in file
1125 [23236] stdio: Harden function pointers in _IO_str_fields
1126 [23250] nptl: Offset of __private_ss differs from GCC
1127 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1128 -mtune=generic -mfpmath=sse
1129 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1131 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1132 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1134 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1135 [23277] math: nan function should not have const attribute
1136 [23279] math: scanf and strtod wrong for some hex floating-point
1137 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
1139 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
1140 [23303] build: undefined reference to symbol
1141 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
1142 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
1144 [23313] stdio: libio vtables validation and standard file object
1146 [23329] libc: The __libc_freeres infrastructure is not properly run across
1148 [23349] libc: Various glibc headers no longer compatible with
1150 [23351] malloc: Remove unused code related to heap dumps and malloc
1152 [23363] stdio: stdio-common/tst-printf.c has non-free license
1153 [23396] regex: Regex equivalence regression in single-byte locales
1154 [23422] localedata: oc_FR: More updates of locale data
1155 [23442] build: New warning with GCC 8
1156 [23448] libc: Out of bounds access in IBM-1390 converter
1157 [23456] libc: Wrong index_cpu_LZCNT
1158 [23458] build: tst-get-cpu-features-static isn't added to tests
1159 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
1161 [23467] dynamic-link: x86/CET: A property note parser bug
1168 * The GNU C Library can now be compiled with support for building static
1169 PIE executables (See --enable-static-pie in INSTALL). These static PIE
1170 executables are like static executables but can be loaded at any address
1171 and provide additional security hardening benefits at the cost of some
1172 memory and performance. When the library is built with --enable-static-pie
1173 the resulting libc.a is usable with GCC 8 and above to create static PIE
1174 executables using the GCC option '-static-pie'. This feature is currently
1175 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
1176 aarch64 with binutils 2.30 or later.
1178 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
1179 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
1182 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
1184 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
1186 * In order to support faster and safer process termination the malloc API
1187 family of functions will no longer print a failure address and stack
1188 backtrace after detecting heap corruption. The goal is to minimize the
1189 amount of work done after corruption is detected and to avoid potential
1190 security issues in continued process execution. Reducing shutdown time
1191 leads to lower overall process restart latency, so there is benefit both
1192 from a security and performance perspective.
1194 * The abort function terminates the process immediately, without flushing
1195 stdio streams. Previous glibc versions used to flush streams, resulting
1196 in deadlocks and further data corruption. This change also affects
1197 process aborts as the result of assertion failures.
1199 * On platforms where long double has the IEEE binary128 format (aarch64,
1200 alpha, mips64, riscv, s390 and sparc), the math library now implements
1201 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
1202 These are the same interfaces added in version 2.26 for some platforms where
1203 this format is supported but is not the format of long double.
1205 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
1206 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
1207 implements interfaces for that type, as defined by ISO/IEC TS
1208 18661-3:2015. These are corresponding interfaces to those supported for
1211 * The math library now implements interfaces for the _Float32, _Float64 and
1212 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
1213 corresponding interfaces to those supported for _Float128.
1215 * glibc now implements the memfd_create and mlock2 functions on Linux.
1217 * Support for memory protection keys was added. The <sys/mman.h> header now
1218 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
1221 * The copy_file_range function was added.
1223 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1225 * The ldconfig utility now processes `include' directives using the C/POSIX
1226 collation ordering. Previous glibc versions used locale-specific
1227 ordering, the change might break systems that relied on that.
1229 * Support for two grammatical forms of month names has been added.
1230 In a call to strftime, the "%B" and "%b" format specifiers will now
1231 produce the grammatical form required when the month is used as part
1232 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1233 required when the month is named by itself. For instance, in Greek
1234 and in many Slavic and Baltic languages, "%B" will produce the month
1235 in genitive case, and "%OB" will produce the month in nominative case.
1237 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1238 are all valid and will all accept any known form of month
1239 name---standalone or complete, abbreviated or full. In a call to
1240 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1241 the strings used by "%B" and "%b", respectively. New query
1242 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1243 used by "%OB" and "%Ob", respectively.
1245 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1246 define the strings for %OB and %Ob, respectively; these have the
1247 same syntax as "mon" and "abmon". These arrays are optional; if they
1248 are not provided then they have the same content as "mon" and "abmon",
1251 These features are provided for locales which define "alt_mon" and/or
1252 "ab_alt_mon" in their locale source data. This release includes such
1253 alternative month name data for the following languages: Belarusian,
1254 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1256 This feature is currently a GNU extension, but it is expected to
1257 be added to the next revision of POSIX, and it is also already
1258 available on some BSD-derived operating systems.
1260 This feature will cause existing statically compiled applications
1261 to fail to load locales and fall back to the builtin C/POSIX locales.
1262 See notes below for other changes affecting compatibility.
1264 * Support for the RISC-V ISA running on Linux has been added. This port
1265 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1266 for the following ISA and ABI pairs:
1272 Deprecated and removed features, and other changes affecting compatibility:
1274 * Statically compiled applications attempting to load locales compiled for the
1275 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1276 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1277 support for two grammatical forms of the month names, also extends the locale
1278 data binary format. Static applications needing locale support must be
1279 recompiled to match the runtime and data they are deployed with. In some
1280 distributions there is an upgrade window where dynamically linked applications
1281 may use a new library but the old locale data and also fall back to the
1282 builtin C/POSIX locales; restarting the application process is sufficient to
1285 * Support for statically linked applications which call dlopen is deprecated
1286 and will be removed in a future version of glibc. Applications which call
1287 dlopen need to be linked dynamically instead.
1289 * Support for old programs which use internal stdio data structures and
1290 functions is deprecated. This includes programs which use the C++ streams
1291 provided by libstdc++ in GCC 2.95. Programs which use the internal
1292 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1293 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1294 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1295 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1296 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1297 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1298 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1299 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1300 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1301 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1302 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1303 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1304 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1305 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1306 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1307 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1308 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1309 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1310 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1311 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1312 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1313 future version of glibc. Unlike other symbol removals, these old
1314 applications will not be supported using compatibility symbols.
1316 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1317 defined by <sys/ptrace.h>.
1319 * libm no longer supports SVID error handling (calling a user-provided
1320 matherr function on error) or the _LIB_VERSION variable to control error
1321 handling. (SVID error handling and the _LIB_VERSION variable still work
1322 for binaries linked against older versions of the GNU C Library.) The
1323 libieee.a library is no longer provided. math.h no longer defines struct
1324 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1325 TLOSS, PLOSS and HUGE.
1327 * The libm functions pow10, pow10f and pow10l are no longer supported for
1328 new programs. Programs should use the standard names exp10, exp10f and
1329 exp10l for these functions instead.
1331 * The mcontext_t type is no longer the same as struct sigcontext. On
1332 platforms where it was previously the same, this changes the C++ name
1333 mangling for interfaces involving this type.
1335 * The add-ons mechanism for building additional packages at the same time as
1336 glibc has been removed. The --enable-add-ons configure option is now
1339 * The --without-fp configure option is now ignored. Whether hardware
1340 floating-point instructions are used is now configured based on whether
1341 the compiler used at configure time (without any options implied by a
1342 --with-cpu= configure option) uses such instructions.
1344 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1345 the specified string can be parsed as a domain name.
1347 * In the malloc_info output, the <heap> element may contain another <aspace>
1348 element, "subheaps", which contains the number of sub-heaps.
1350 * The libresolv function p_secstodate is no longer supported for new
1353 * The tilepro-*-linux-gnu configuration is no longer supported.
1355 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1356 and will be removed in a future release. Software that is still using
1357 either header should be updated to use standard <stdio.h> interfaces
1360 libio.h was originally the header for a set of supported GNU extensions,
1361 but they have not been maintained as such in many years, they are now
1362 standing in the way of improvements to stdio, and we don't think there are
1363 any remaining external users. _G_config.h was never intended for public
1364 use, but predates the bits convention.
1366 Changes to build and runtime requirements:
1368 * bison version 2.7 or later is required to generate code in the 'intl'
1371 Security related changes:
1373 CVE-2009-5064: The ldd script would sometimes run the program under
1374 examination directly, without preventing code execution through the
1375 dynamic linker. (The glibc project disputes that this is a security
1376 vulnerability; only trusted binaries must be examined using the ldd
1379 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1380 suffered from a one-byte overflow during ~ operator processing (either
1381 on the stack or the heap, depending on the length of the user name).
1382 Reported by Tim RĂŒhsen.
1384 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1385 would sometimes fail to free memory allocated during ~ operator
1386 processing, leading to a memory leak and, potentially, to a denial
1389 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1390 without GLOB_NOESCAPE, could write past the end of a buffer while
1391 unescaping user names. Reported by Tim RĂŒhsen.
1393 CVE-2017-17426: The malloc function, when called with an object size near
1394 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1395 instead of NULL. This was a regression introduced with the new malloc
1396 thread cache in glibc 2.26. Reported by Iain Buclaw.
1398 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1399 to the allocation of too much memory. (This is not a security bug per se,
1400 it is mentioned here only because of the CVE assignment.) Reported by
1403 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1404 of the number of search path components. (This is not a security
1405 vulnerability per se because no trust boundary is crossed if the fix for
1406 CVE-2017-1000366 has been applied, but it is mentioned here only because
1407 of the CVE assignment.) Reported by Qualys.
1409 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1410 for AT_SECURE or SUID binaries could be used to load libraries from the
1413 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1414 succeeds without returning an absolute path due to unexpected behaviour
1415 of the Linux kernel getcwd syscall. Reported by halfdog.
1417 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1418 an object size near the value of SIZE_MAX, would return a pointer to a
1419 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1421 CVE-2018-6551: The malloc function, when called with an object size near
1422 the value of SIZE_MAX, would return a pointer to a buffer which is too
1423 small, instead of NULL.
1425 The following bugs are resolved with this release:
1427 [866] glob: glob should match dangling symlinks
1428 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1429 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1431 [5997] math: Very slow execution of sinf function
1432 [10580] localedata: hr_HR: updated locale
1433 [10871] locale: 'mon' array should contain both nominative and genitive
1435 [12349] localedata: eu_ES: incorrect thousands separator
1436 [13605] localedata: shn_MM: new Shan locale
1437 [13805] localedata: ru_RU: currency should use ',' as radix point
1438 [13953] localedata: km_KH: locale update
1439 [13994] localedata: mjw_IN: new locale
1440 [14121] build: make writes .mo files in po directory
1441 [14333] libc: Fix the race between atexit() and exit()
1442 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1443 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1445 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1446 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1447 width Latin characters
1448 [15332] localedata: es_CU: locale update
1449 [15436] stdio: Don't close or flush stdio streams on abort
1450 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1452 [16148] localedata: ca_ES: incorrect thousands separator
1453 [16750] dynamic-link: ldd should not try to execute the binaries
1455 [16777] localedata: pl_PL: incorrect thousands separator in locale
1456 [16905] localedata: hanzi: new collation
1457 [17563] localedata: cmn_TW: add hanzi collation
1458 [17750] localedata: wrong collation order of diacritics in most locales
1459 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1461 [17956] build: Build fails on missing definitions from header file
1462 nss/nss.h when Mozilla NSS is used for cryptography
1463 [18203] libc: realpath() does not handle unreachable paths correctly
1464 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1465 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1466 [18822] libc: Internal functions are called via PLT
1467 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1468 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1469 [19574] libc: glibc should support building static PIE binaries
1470 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1472 [19971] glob: glob: Do not skip entries with zero d_ino values
1473 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1474 [20008] localedata: km_KH: convert to translit_neutral
1475 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1476 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1477 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1478 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1479 [20498] localedata: miq_NI: new MĂskitu / Miskito (miq) language locale
1481 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1482 they're set, wrong errors returned by gaih_inet when lookup functions
1484 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1485 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1487 [20952] localedata: yuw_PG: new locale
1488 [21084] localedata: charmaps/IBM858: new codepage
1489 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1490 [21242] libc: assert gives pedantic warning in old gcc versions
1491 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1492 __regcall calling convention
1493 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1494 [21326] libc: C99 functions are not declared for C++11 and later if
1495 _GNU_SOURCE is not predefined by g++
1496 [21457] libc: sys/ucontext.h namespace
1497 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1498 [21660] math: GCC fails to compile a formula with tgmath.h
1499 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1500 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1501 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1502 [21684] math: tgmath.h handling of complex integers
1503 [21685] math: tgmath.h handling of bit-fields
1504 [21686] math: tgmath.h handling of __int128
1505 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1507 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1509 [21750] localedata: column width of characters incompatible with classical
1511 [21754] malloc: malloc: Perform as little work as possible after heap
1512 consistency check failures
1513 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1514 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1515 [21791] string: Unused XXX_chk_XXX functions in libc.a
1516 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1518 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1520 [21845] localedata: Added new Locale bho_NP
1521 [21853] localedata: Fix abday Which looks same as day in zh_SG
1522 [21854] localedata: Added New Locale en_SC
1523 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1524 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1525 _dl_runtime_resolve_avx_slow
1526 [21885] network: getaddrinfo: gethosts does not release resolver context
1527 on memory allocation failure
1528 [21899] libc: XPG4.2 sigaction namespace
1529 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1531 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1533 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1534 errno value, causing getaddrinfo to fail
1535 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1536 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1537 instead of EAI_NODATA
1538 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1539 constant PTRACE_SEIZE_DEVEL
1540 [21930] math: C-only gcc builtins used in <math.h> isinf
1541 [21932] network: Unpaired __resolv_context_get in generic get*_r
1543 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1544 [21944] libc: sigval namespace
1545 [21951] localedata: Update hanzi collation by stroke
1546 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1547 sysdeps/x86_64/fpu/e_expf.S
1548 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1549 allocation in syscall loops)
1550 [21959] localedata: Fix Country name for xh_ZA
1551 [21960] localedata: Fix abmon for bem_ZM
1552 [21966] math: AVX2 mathvec functions use FMA without checking
1553 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1554 [21971] localedata: Added New Locale for mfe_MU
1555 [21972] libc: assert macro requires operator== (int) for its argument type
1556 [21973] math: [sparc] libm missing sqrtl compat symbol
1557 [21974] libc: Remove __bb_init_func and __bb_exit_func
1558 [21982] string: stratcliff.c: error: assuming signed overflow does not
1560 [21986] stdio: __guess_grouping is called incorrectly
1561 [21987] math: [sparc32] wrong bits/long-double.h installed
1562 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1564 [22022] localedata: Missing country_name for mni_IN
1565 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1567 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1569 [22026] locale: iconv_open: heap overflow on gconv_init failure
1570 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1571 [22035] math: [m68k] bits/math-inline.h macro namespace
1572 [22038] localedata: Fix abbreviated weeks and months for Somali
1573 [22044] localedata: Remove redundant data for Limburgish Language
1574 [22050] malloc: Linking with -lmcheck does not hook
1575 __malloc_initialize_hook correctly
1576 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1577 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1578 [22070] localedata: charmaps/UTF-8: wcwidth for
1579 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1580 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1581 Jungseong and Jongseong) should be 0
1582 [22078] nss: nss_files performance issue in multi mode
1583 [22082] math: bits/math-finite.h exp10 condition
1584 [22086] libc: pcprofiledump incorrect cross-endian condition
1585 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1586 [22095] network: Name server address allocation memory leak in resolv.conf
1588 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1590 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1591 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1593 [22111] malloc: malloc: per thread cache is not returned when thread exits
1594 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1595 [22134] libc: [linux] implement fexecve with execveat
1596 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1598 [22145] libc: ttyname() gives up too early in the face of namespaces
1599 [22146] math: C++ build issue with float128 on x86_64
1600 [22153] nptl: nptl: save error code before process termination
1601 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1602 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1603 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1604 [22165] libc: [hppa] Text relocations in libc.so
1605 [22180] libc: destructor registered via __cxa_atexit is called twice
1606 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1607 symlinks") cause "make" segfaults
1608 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1610 [22207] libc: FAIL: stdlib/test-atexit-race
1611 [22225] math: nearbyint arithmetic moved before feholdexcept
1612 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1613 [22235] math: iscanonical in C++ and float128
1614 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1615 the svid compat wrapper
1616 [22244] math: ynf and yn are wrong without the svid compat wrapper
1617 [22273] libc: Improper assert in Linux posix_spawn implementation
1618 [22284] libc: -pg -pie doesn't work
1619 [22292] locale: localedef exits with error 4 when it should be error 1
1620 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1621 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1623 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1624 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1626 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1627 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1628 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1629 [22322] libc: [mips64] wrong bits/long-double.h installed
1630 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1631 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1633 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1634 [22343] malloc: Integer overflow in posix_memalign
1635 [22347] libc: getrandom() returns the number of bytes that were copied to
1636 the buffer even though the comments say "Return 0 on success and -1 on
1638 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1639 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1641 [22370] dynamic-link: Incorrect note padding check
1642 [22375] libc: malloc returns pointer from tcache_get when should return
1643 NULL (CVE-2017-17426)
1644 [22377] math: iseqsig, float128 and C++
1645 [22382] localedata: Error in tpi_PG locale
1646 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1647 inside the ASCII printable range
1648 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1650 [22403] localedata: Slash needs escaping in some locales
1651 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1652 [22409] network: res_hnok does not accept some host names used on the
1654 [22412] network: res_dnok, res_hnok should perform syntax checks
1655 [22413] network: ns_name_pton ignores syntactically invalid trailing
1657 [22415] stdio: setvbuf can lead to invalid free/segfault
1658 [22432] build: Non-deterministic build
1659 [22439] malloc: malloc_info should compute summary statistics for all sub-
1661 [22442] network: if_nametoindex could report index for the wrong
1662 networking interface
1663 [22446] build: aliasing violation calling readlink in handle_request
1664 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1665 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1666 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1667 __nscd_hash/__nss_hash
1668 [22463] network: p_secstodate overflow handling
1669 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1670 [22478] libc: sigwait can fail with EINTR
1671 [22505] libc: ldconfig processes include directive in locale-specific
1673 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1674 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1675 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1676 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1677 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1678 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1679 same as for Croatian
1680 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1681 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1682 [22577] libc: missing newline after "cannot allocate TLS data structures
1684 [22588] manual: manual/conf.texi: missing underscore in front of
1686 [22593] math: nextafter and nexttoward are declared with const attribute
1687 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1688 [22603] string: ia64 memchr overflows internal pointer check
1689 [22605] libc: SH clone does not set the exit code correctly
1690 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1692 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1693 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1694 modified in case of success
1695 [22614] build: gcc: error: unrecognized command line option â-no-pieâ
1696 [22615] manual: manual: ambiguous wording about errno value in case of
1698 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1700 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1701 binaries or if /proc is not mounted (CVE-2017-16997)
1702 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1703 [22630] build: $(no-pie-ldflag) is no longer effective
1704 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1705 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1706 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1707 [22637] nptl: guard size is subtracted from thread stack size instead of
1709 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1710 [22657] localedata: hu_HU: Avoid double space in date
1711 [22660] math: fmax, fmin sNaN handling on alpha
1712 [22664] libc: New warning of GCC8
1713 [22665] math: alpha: ceil and floor raise inexact exceptions
1714 [22666] math: alpha: trunc raise inexact exceptions
1715 [22667] libc: makecontext lacks stack alignment on i386
1716 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1717 [22679] libc: getcwd(3) can succeed without returning an absolute path
1719 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1720 elision and tunables
1721 [22687] math: [powerpc-nofpu] complex long double functions spurious
1723 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1724 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1725 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1727 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1728 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1730 [22701] nis: Incomplete removal of libnsl
1731 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1732 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1733 [22715] dynamic-link: FAIL: elf/tst-audit10
1734 [22719] libc: Backtrace tests fail on hppa
1735 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1736 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1737 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1738 before the first call to crypt_r () in crypt/badsalttest.c
1745 * A per-thread cache has been added to malloc. Access to the cache requires
1746 no locks and therefore significantly accelerates the fast path to allocate
1747 and free small amounts of memory. Refilling an empty cache requires locking
1748 the underlying arena. Performance measurements show significant gains in a
1749 wide variety of user workloads. Workloads were captured using a special
1750 instrumented malloc and analyzed with a malloc simulator. Contributed by
1751 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1753 * Unicode 10.0.0 Support: Character encoding, character type info, and
1754 transliteration tables are all updated to Unicode 10.0.0, using
1755 generator scripts contributed by Mike FABIAN (Red Hat).
1756 These updates cause user visible changes, especially the changes in
1757 wcwidth for many emoji characters cause problems when emoji sequences
1758 are rendered with pango, see for example:
1759 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1761 * Collation of Hungarian has been overhauled and is now consistent with "The
1762 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1765 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1767 - The GNU C Library will now detect when /etc/resolv.conf has been
1768 modified and reload the changed configuration. The new resolver option
1769 âno-reloadâ (RES_NORELOAD) disables this behavior.
1771 - The GNU C Library now supports an arbitrary number of search domains
1772 (configured using the âsearchâ directive in /etc/resolv.conf);
1773 previously, there was a hard limit of six domains. For backward
1774 compatibility, applications that directly modify the â_resâ global
1775 object are still limited to six search domains.
1777 - When the ârotateâ (RES_ROTATE) resolver option is active, the GNU C
1778 Library will now randomly pick a name server from the configuration as a
1779 starting point. (Previously, the second name server was always used.)
1781 * The tunables feature is now enabled by default. This allows users to tweak
1782 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1784 * New function reallocarray, which resizes an allocated block (like realloc)
1785 to the product of two sizes, with a guaranteed clean failure upon integer
1786 overflow in the multiplication. Originally from OpenBSD, contributed by
1787 Dennis Wölfing and RĂŒdiger Sonderfeld.
1789 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1790 These are extended versions of preadv and pwritev, respectively, taking an
1791 additional flags argument. The set of supported flags depends on the
1792 running kernel; full support currently requires kernel 4.7 or later.
1794 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1795 create a new session ID for the spawned process. This feature is
1796 scheduled to be added to the next major revision of POSIX; for the time
1797 being, it is available under _GNU_SOURCE.
1799 * errno.h is now safe to use from C-preprocessed assembly language on all
1800 supported operating systems. In this context, it will only define the
1801 Exxxx constants, as preprocessor macros expanding to integer literals.
1803 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1804 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1805 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1806 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1808 To compile programs that use this feature, the compiler must support
1809 128-bit floating point with the type name _Float128 (as defined by TS
1810 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1811 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1812 must be defined to make the new interfaces visible.
1814 The new functions and macros correspond to those present for other
1815 floating-point types (except for a few obsolescent interfaces not
1816 supported for the new type), with F128 or f128 suffixes; for example,
1817 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1818 printf or scanf formats for the new type; the strfromf128 and strtof128
1819 interfaces should be used instead.
1821 Deprecated and removed features, and other changes affecting compatibility:
1823 * The synchronization that pthread_spin_unlock performs has been changed to
1824 now be equivalent to a C11 atomic store with release memory order to the
1825 spin lock's memory location. Previously, several (but not all)
1826 architectures used stronger synchronization (e.g., containing what is
1827 often called a full barrier). This change can improve performance, but
1828 may affect odd fringe uses of spin locks that depend on the previous
1829 behavior (e.g., using spin locks as atomic variables to try to implement
1830 Dekker's mutual exclusion algorithm).
1832 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1835 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1836 will only be built and installed when the GNU C Library is configured with
1837 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1838 as TIRPC or rpcsvc-proto, to be used.
1840 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1841 libnss_compat, are deprecated, and will not be built or installed by
1844 The NIS(+) support library, libnsl, is also deprecated. By default, a
1845 compatibility shared library will be built and installed, but not headers
1846 or development libraries. Only a few NIS-related programs require this
1847 library. (In particular, the GNU C Library has never required programs
1848 that use 'gethostbyname' to be linked with libnsl.)
1850 Replacement implementations based on TIRPC, which additionally support
1851 IPv6, are available from <https://github.com/thkukuk/>. The configure
1852 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1853 name service modules, to be built and installed.
1855 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1856 support is enabled, the configured recursive resolver must support EDNS.
1857 (Responding to EDNS-enabled queries with responses which are not
1858 EDNS-enabled is fine, but FORMERR responses are not.)
1860 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1861 servers have not supported this opcode for a long time.
1863 * The _res_opcodes variable has been removed from libresolv. It had been
1864 exported by accident.
1866 * <string.h> no longer includes inline versions of any string functions,
1867 as this kind of optimization is better done by the compiler. The macros
1868 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1870 * The nonstandard header <xlocale.h> has been removed. Most programs should
1871 use <locale.h> instead. If you have a specific need for the definition of
1872 locale_t with no other declarations, please contact
1873 libc-alpha@sourceware.org and explain.
1875 * The obsolete header <sys/ultrasound.h> has been removed.
1877 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1879 * The obsolete function cfree has been removed. Applications should use
1882 * The stack_t type no longer has the name struct sigaltstack. This changes
1883 the C++ name mangling for interfaces involving this type.
1885 * The ucontext_t type no longer has the name struct ucontext. This changes
1886 the C++ name mangling for interfaces involving this type.
1888 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1889 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1890 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1891 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1892 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1893 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1894 fpregset_t type no longer has the name struct fpu. This changes the C++
1895 name mangling for interfaces involving those types.
1897 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1898 synced with the kernel:
1900 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1901 are not supported on this architecture and have been removed.
1903 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1904 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1905 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1907 Programs that assume the GET/SETREGS ptrace requests are universally
1908 available will now fail to build, instead of malfunctioning at runtime.
1910 Changes to build and runtime requirements:
1912 * Linux kernel 3.2 or later is required at runtime, on all architectures
1913 supported by that kernel. (This is a change from version 2.25 only for
1916 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1918 * On most architectures, GCC 4.9 or later is required to build the GNU C
1919 Library. On powerpc64le, GCC 6.2 or later is required.
1921 Older GCC versions and non-GNU compilers are still supported when
1922 compiling programs that use the GNU C Library. (We do not know exactly
1923 how old, and some GNU extensions to C may be _de facto_ required. If you
1924 are interested in helping us make this statement less vague, please
1925 contact libc-alpha@sourceware.org.)
1927 Security related changes:
1929 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1930 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1932 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1933 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1935 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1936 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1939 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1940 fixed (CVE-2017-12133).
1942 The following bugs are resolved with this release:
1944 [984] network: Respond to changed resolv.conf in gethostbyname
1945 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1946 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1948 [12189] libc: __stack_chk_fail should not attempt a backtrace
1950 [14096] time: Race condition on timezone/tst-timezone.out
1951 [14172] localedata: az_IR: new locale
1952 [14995] build: glibc fails to build if gold is the default linker, even if
1954 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1955 [16637] network: inet_pton function is accepting IPv6 with bad format
1956 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1957 x86 and other generic code
1958 [16875] localedata: ko_KR: fix lang_name
1959 [17225] localedata: ar_SY: localized month names for May and June are
1961 [17297] localedata: da_DK: wrong date_fmt string
1962 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1963 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1964 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1965 [19066] localedata: ar_SA abbreviated day and month names are in English
1966 [19569] network: resolv: Support an arbitrary number of search domains
1967 [19570] network: Implement random DNS server selection in the stub
1969 [19838] locale: localedef fails on PA-RISC
1970 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1971 order of 0D36 and 0D37
1972 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1974 [20098] libc: FAIL: debug/backtrace-tst on hppa
1975 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1977 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1979 [20313] localedata: Update locale data to Unicode 9.0
1980 [20424] manual: Document how to provide a malloc replacement
1981 [20496] localedata: agr_PE: new language locale AwajĂșn / Aguaruna (agr)
1983 [20686] locale: Add el_GR@euro to SUPPORTED.
1984 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1985 failures consistently
1986 [21015] dynamic-link: Document and fix --enable-bind-now
1987 [21016] nptl: pthread_cond support is broken on hppa
1988 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1989 frame-pointer on i386
1990 [21049] libc: segfault in longjmp_chk() due to clobbered processor
1992 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
1993 [21088] libc: Build fails with --enable-static-nss
1994 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
1995 generic c code is used
1996 [21109] libc: Tunables broken on big-endian
1997 [21112] math: powf has large ulp errors with base close to 1 and exponent
1999 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
2001 [21120] malloc: glibc malloc is incompatible with GCC 7
2002 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
2004 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
2005 (-0.0) when linking with -lieee
2006 [21171] math: log10, log2 and lgamma return incorrect results
2007 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
2008 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
2009 [21207] localedata: ce_RU: update weekdays from CLDR
2010 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
2011 [21217] localedata: Update months from CLDR-31
2012 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
2013 [21243] libc: support_delete_temp_file should issue warning for failed
2015 [21244] libc: support resolv_test_start() socket fd close should be
2017 [21253] libc: localedef randomly segfaults when using -fstack-check due to
2018 new posix_spawn implementation
2019 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2020 leads to lower CPU frequency
2021 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2022 [21261] libc: [sparc64] bits/setjmp.h namespace
2023 [21267] network: [mips] bits/socket.h IOC* namespace
2024 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2025 [21270] libc: mmap64 silently truncates large offset values
2026 [21275] libc: posix_spawn always crashes on ia64 now
2027 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2028 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2029 [21289] libc: Incorrect declaration for 32-bit platforms with
2030 _FILE_OFFSET_BITS=64 causes build error
2031 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2032 not support gethostbyname4_r
2033 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2035 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2037 [21340] libc: Support POSIX_SPAWN_SETSID
2038 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2039 [21359] network: ns_name_pack needs additional byte in destination buffer
2040 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2041 against fragmentation attacks (CVE-2017-12132)
2042 [21369] network: resolv: Remove EDNS fallback
2043 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2045 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2046 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2047 [21393] stdio: Missing dup3 error check in freopen, freopen64
2048 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2049 [21399] localedata: Bad description for U00EC in
2050 localedata/charmaps/CP1254
2051 [21411] malloc: realloc documentation error
2052 [21426] network: sys/socket.h uio.h namespace
2053 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2054 [21445] libc: signal.h bsd_signal namespace
2055 [21455] network: Network headers stdint.h namespace
2056 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2058 [21475] network: resolv: Overlong search path is truncated mid-label
2059 [21511] libc: sigstack namespace
2060 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2061 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2062 bits/syscall.h: No such file or directory
2063 [21517] libc: struct sigaltstack namespace
2064 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2065 [21533] localedata: Update locale data to Unicode 10.0
2067 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2068 junk at end of line, first unrecognized character is `@'
2069 [21538] libc: SIG_HOLD missing for XPG4
2070 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2071 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2072 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2073 [21543] libc: sigevent namespace
2074 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2075 size for general purpose registers in mcontext_t structure
2076 [21550] libc: sigwait namespace
2077 [21552] libc: XPG4 bsd_signal namespace
2078 [21554] libc: sigpause namespace
2079 [21560] libc: sys/wait.h signal.h namespace
2080 [21561] libc: waitid namespace
2081 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2082 '/usr/include/stdlib.h': Permission denied
2083 [21575] libc: sys/wait.h missing struct rusage definition
2084 [21584] libc: sigaltstack etc namespace
2085 [21597] libc: siginterrupt namespace
2086 [21607] math: hppa: FAIL: math/test-tgmath
2087 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2089 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2090 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2091 stack and heap (CVE-2017-1000366)
2092 [21625] libc: wait3 namespace
2093 [21654] nss: Incorrect pointer alignment in NSS group merge result
2095 [21657] network: Parse interface zone id for node-local multicast
2096 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2098 [21666] libc: .symver is used on common symbol
2099 [21668] network: resolv: res_init cross-thread broadcast introduces race
2101 [21687] math: tgmath.h totalorder, totalordermag return type
2102 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2104 [21696] libc: Incorrect assumption of of __cpu_mask in
2105 posix/sched_cpucount.c
2106 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2107 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2109 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2110 leading to relocation crash
2111 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2112 `resolv_conf_matches (resp, conf)' failed.
2113 [21710] localedata: Added Samoan language locale for Samoa
2114 [21711] localedata: Pashto yesstr/nostr locale are missing
2115 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2116 __have_pthread_attr_t can cause redefinition of typedef âpthread_attr_tâ
2117 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2118 [21723] localedata: yesstr/nostr missing for Chinese language locale
2119 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2121 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2123 [21728] localedata: New Locale for Tongan language
2124 [21729] localedata: incorrect LC_NAME fields for hi_IN
2125 [21733] localedata: yesstr and nostr are missing for zh_HK
2126 [21734] localedata: Missing yesstr and nostr are for kw_GB
2127 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2128 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2129 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2130 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2132 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2134 [21749] localedata: Wrong abbreviated day name (âabdayâ) for
2136 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
2137 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
2138 [21759] localedata: missing yesstr and nostr for Tigrinya
2139 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
2140 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
2141 [21767] localedata: Missing Bislama locales
2142 [21768] localedata: Missing yesstr and nostr for aa_ET
2143 [21770] localedata: Missing Field in li_NL
2144 [21778] nptl: Robust mutex may deadlock
2145 [21779] libc: MicroBlaze segfaults when loading libpthread
2146 [21783] localedata: Fix int_select international_call_prefixes
2147 [21784] localedata: Inconsistency in country_isbn
2148 [21788] localedata: Missing Country Postal Abbreviations
2149 [21794] localedata: Added-country_isbn-for-Italy
2150 [21795] localedata: Add/Fix country_isbn for France
2151 [21796] localedata: Added country_isbn for Republic of Korea
2152 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
2153 [21799] localedata: Added int_select international_call_prefixes
2154 [21801] localedata: Added int_select international_call_prefixes
2155 [21804] nptl: Double semicolon in thread-shared-types.h
2156 [21807] localedata: LC_ADDRESS fix for pap_CW
2157 [21808] localedata: Fix LC_ADDRESS for pap_AW
2158 [21821] localedata: Added country_name in mai_IN
2159 [21822] localedata: Fix LC_TIME for mai_IN
2160 [21823] localedata: missing yesstr, nostr for sa_IN
2161 [21825] localedata: Fix name_mrs for mag_IN
2162 [21828] localedata: 2.26 changelog should mention user visible changes
2164 [21835] localedata: Added Maithili language locale for Nepal
2165 [21838] localedata: Removed redundant data for the_NP
2166 [21839] localedata: Fix LC_MONETARY for ta_LK
2167 [21844] localedata: Fix Latin characters and Months Sequence.
2168 [21848] localedata: Fix mai_NP Title Name
2173 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
2174 24731-2:2010, is supported to enable declarations of functions from that
2175 TR. Note that not all functions from that TR are supported by the GNU C
2178 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
2179 18661-1:2014, is supported to enable declarations of functions and macros
2180 from that TS. Note that not all features from that TS are supported by
2183 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
2184 18661-4:2015, is supported to enable declarations of functions and macros
2185 from that TS. Note that most features from that TS are not supported by
2188 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
2189 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
2190 Since the GNU C Library defaults to a much newer revision of POSIX, this
2191 will only affect programs that specifically request an old conformance
2192 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
2193 see a change in the visible declarations, but a program compiled with
2194 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
2197 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
2198 defined by all multithreaded code, but glibc has not required this for
2201 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
2202 means that in a future release, the macros âmajorâ, âminorâ, and âmakedevâ
2203 will only be available from <sys/sysmacros.h>.
2205 These macros are not part of POSIX nor XSI, and their names frequently
2206 collide with user code; see for instance glibc bug 19239 and Red Hat bug
2207 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
2208 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
2211 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
2212 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
2213 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
2215 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
2216 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
2217 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
2218 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
2219 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
2220 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
2221 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
2222 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
2223 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2224 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2225 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2228 * New <math.h> features are added from TS 18661-1:2014:
2230 - Signaling NaN macros: SNANF, SNAN, SNANL.
2232 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2233 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2234 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2236 - llogb functions: the llogb, llogbf and llogbl functions, and the
2237 FP_LLOGB0 and FP_LLOGBNAN macros.
2239 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2242 - Comparison macros: iseqsig.
2244 - Classification macros: iscanonical, issubnormal, iszero.
2246 - Total order functions: totalorder, totalorderf, totalorderl,
2247 totalordermag, totalordermagf, totalordermagl.
2249 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2251 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2252 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2254 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2255 are added to libc. They convert a floating-point number into string.
2257 * Most of glibc can now be built with the stack smashing protector enabled.
2258 It is recommended to build glibc with --enable-stack-protector=strong.
2259 Implemented by Nick Alcock (Oracle).
2261 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2262 intended to be used instead of memset() to erase sensitive data after use;
2263 the compiler will not optimize out calls to explicit_bzero even if they
2264 are "unnecessary" (in the sense that no _correct_ program can observe the
2265 effects of the memory clear).
2267 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2268 to float instead of double. This does not affect the ABI of any libraries
2269 that are part of the GNU C Library, but may affect the ABI of other
2270 libraries that use this type in their interfaces.
2272 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2273 float_t and double_t types are now defined to long double instead of float
2274 and double. These options are not the default, and this does not affect
2275 the ABI of any libraries that are part of the GNU C Library, but it may
2276 affect the ABI of other libraries that use this type in their interfaces,
2277 if they are compiled or used with those options.
2279 * The getentropy and getrandom functions, and the <sys/random.h> header file
2282 * The buffer size for byte-oriented stdio streams is now limited to 8192
2283 bytes by default. Previously, on Linux, the default buffer size on most
2284 file systems was 4096 bytes (and thus remains unchanged), except on
2285 network file systems, where the buffer size was unpredictable and could be
2286 as large as several megabytes.
2288 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2289 for the Linux quota interface which predates kernel version 2.4.22 has
2292 * The malloc_get_state and malloc_set_state functions have been removed.
2293 Already-existing binaries that dynamically link to these functions will
2294 get a hidden implementation in which malloc_get_state is a stub. As far
2295 as we know, these functions are used only by GNU Emacs and this change
2296 will not adversely affect already-built Emacs executables. Any undumped
2297 Emacs executables, which normally exist only during an Emacs build, should
2298 be rebuilt by re-running â./configure; makeâ in the Emacs build tree.
2300 * The âip6-dotintâ and âno-ip6-dotintâ resolver options, and the
2301 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2302 âno-ip6-dotintâ had already been the default, and support for the
2303 âip6-dotintâ option was removed from the Internet in 2006.
2305 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2306 flag from <resolv.h> have been removed. The option relied on a
2307 backwards-incompatible DNS extension which was never deployed on the
2310 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2311 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2312 They were already unimplemented.
2314 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2315 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2316 removed again from the IETF name lookup interface specification in RFC
2317 2553. Applications should use getaddrinfo instead.
2319 * DNSSEC-related declarations and definitions have been removed from the
2320 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2321 decode the data part of DNSSEC record types. Previous versions of glibc
2322 only implemented minimal support for the previous version of DNSSEC, which
2323 is incompatible with the currently deployed version.
2325 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2326 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2327 <arpa/nameser.h> header file because the distinction between RR types and
2328 meta-RR types is not officially standardized, subject to revision, and
2329 thus not suitable for encoding in a macro.
2331 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2332 and rhook members of the res_state type in <resolv.h> have been removed.
2333 The glibc stub resolver did not support these hooks, but the header file
2334 did not reflect that.
2336 * For multi-arch support it is recommended to use a GCC which has
2337 been built with support for GNU indirect functions. This ensures
2338 that correct debugging information is generated for functions
2339 selected by IFUNC resolvers. This support can either be enabled by
2340 configuring GCC with '--enable-gnu-indirect-function', or by
2341 enabling it by default by setting 'default_gnu_indirect_function'
2342 variable for a particular architecture in the GCC source file
2345 * GDB pretty printers have been added for mutex and condition variable
2346 structures in POSIX Threads. When installed and loaded in gdb these pretty
2347 printers show various pthread variables in human-readable form when read
2348 using the 'print' or 'display' commands in gdb.
2350 * Tunables feature added to allow tweaking of the runtime for an application
2351 program. This feature can be enabled with the '--enable-tunables' configure
2352 flag. The GNU C Library manual has details on usage and README.tunables has
2353 instructions on adding new tunables to the library.
2355 * A new version of condition variables functions have been implemented in
2356 the NPTL implementation of POSIX Threads to provide stronger ordering
2359 * A new version of pthread_rwlock functions have been implemented to use a more
2360 scalable algorithm primarily through not using a critical section anymore to
2363 Security related changes:
2365 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2366 have been created with makecontext could fail to terminate due to a
2367 missing .cantunwind annotation. This has been observed to lead to a hang
2368 (denial of service) in some Go applications compiled with gccgo. Reported
2369 by Andreas Schwab. (CVE-2016-6323)
2371 * The DNS stub resolver functions would crash due to a NULL pointer
2372 dereference when processing a query with a valid DNS question type which
2373 was used internally in the implementation. The stub resolver now uses a
2374 question type which is outside the range of valid question type values.
2377 The following bugs are resolved with this release:
2379 [4099] stdio: Overly agressive caching by stream i/o functions.
2380 [7065] build: Support building glibc with -fstack-protector or -fstack-
2382 [9842] localedata: en_CA: incorrect date format
2383 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2384 before it started waiting
2385 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2386 [15765] nptl: sem_open is wrongly a cancellation point
2387 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2388 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2390 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2391 library linked with pthread
2392 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2393 "FIXME: Ingo" issue)
2394 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2395 [17252] libc: getrandom and getentropy syscall
2396 [17730] malloc: thread-local storage is sometimes improperly free()'d
2397 after being __libc_memalign()'d
2398 [18241] stdio: failed fseek on memstream does not set errno and can fail
2400 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2402 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2403 PTHREAD_PRIO_INHERIT mutex on ARM
2404 [18784] network: res_query and related function crash for special record
2405 type queries (CVE-2015-5180)
2406 [19380] math: strtod does not raise "inexact"
2407 [19387] string: Integer overflow in memchr
2408 [19390] string: Integer overflow in strncat
2409 [19398] build: linknamespace tests fail with massively parallel build
2410 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2412 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2413 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2414 [19514] libc: [PATCH] Fix spelling errors in spelling
2415 "implement"/"implementation" in several places
2416 [19582] network: Deprecate RES_USE_INET6
2417 [19673] manual: clog10 docs appear to be erroneous
2418 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2419 causes a segmentation fault
2420 [19826] libc: invalid pointer returned from __tls_get_addr with static
2422 [20016] network: resolv: Remove hooks support from the API
2423 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2425 [20033] math: [x86_64] vectorized math function don't call the __finite
2427 [20116] nptl: use after free in pthread_create
2428 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2429 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2431 [20311] nptl: please install proc_service.h
2432 [20366] libc: Compilation errors in installed headers in strict-compliance
2434 [20370] malloc: malloc: Arena free list management is still racy
2435 (incorrect fix in bug 19243)
2436 [20386] libc: assert (X = 0) does not result in GCC warning
2437 [20432] malloc: malloc: Minimize interface required for interposition
2438 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2439 in _Unwind_Backtrace (CVE-2016-6323)
2440 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2441 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2443 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2444 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2445 [20477] network: resolv: incorrect double-checked locking related to
2447 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2449 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2451 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2452 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2453 cause transition penalty
2454 [20517] math: sparcv9 missing fdiml compat symbol
2455 [20524] manual: strverscmp is inconsistent
2456 [20525] libc: <sys/quota.h> should be based on kernel headers
2457 [20539] math: GCC 7 -static -lm fails to link at -O3
2458 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2460 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2462 [20591] network: Remove obsolete DNSSEC support
2463 [20592] network: DNS resource record type classification macros in
2464 <arpa/nameser.h> are incorrect
2465 [20593] network: Update DNS RR type definitions
2466 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2467 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2469 [20629] network: libresolv: Remove support for bitstring labels
2471 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2472 assertion: "maxidx >= 2"
2473 [20660] math: [arm] Use VSQRT
2474 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2475 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2476 [20689] libc: Test for FMA should also check for AVX.
2477 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2478 [20715] math: iszero macro breaks existing code
2479 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2480 [20728] libc: powerpc: Missing TOC stub in clone
2481 [20729] build: glibc-2.24 fails to build for i486 with -Os
2482 [20750] build: Build fails with default PIE enabled gcc-6.x
2483 [20768] math: [alpha] sqrt fegetenv namespace
2484 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2486 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2487 __FLT_EVAL_METHOD__ is 2
2488 [20790] network: rpcgen buffer overrun in get_prog_declaration
2489 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2490 [20829] libc: crypt snprintf namespace
2491 [20847] libc: tst-vfork3 failure
2492 [20855] math: Default bits/mathdef.h has inappropriate float_t
2493 [20859] math: [sh4] FP_ILOGB0 invalid
2494 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2495 U+20AC), not same as GBK
2496 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2497 [20916] math: pow handling of sNaN arguments
2498 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2499 [20919] math: Bad pow (qNaN, 0) result with -lieee
2500 [20940] math: hypot sNaN handling
2501 [20947] math: fmax, fmin sNaN handling
2502 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2503 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2505 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2506 [20973] nptl: robust mutexes: Lost wake-ups
2507 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2508 [20978] nis: strlen on null pointer in nss_nisplus
2509 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2511 [21014] string: i686 memchr overflows internal pointer check
2512 [21019] libc: [mips] n32 lseek incorrect on overflow
2513 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2514 [21026] libc: [MIPS] readahead syscall is broken on n64
2515 [21028] math: Fallback fesetexceptflag should always succeed
2516 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2517 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2519 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2520 [21061] librt: [microblaze] librt lost clock_* exports
2521 [21073] libc: tunables: insecure environment variables passed to
2522 subprocesses with AT_SECURE
2523 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2527 * The minimum Linux kernel version that this version of the GNU C Library
2528 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2529 kernel version 2.6.32 or later suffices (on architectures that already
2530 required kernel versions more recent than 3.2, those requirements remain
2531 unchanged). Linux 3.2 or later kernel headers are required on all
2534 * The pap_AN locale has been deleted. This has been deprecated for a long
2535 time. It has been replaced by pap_AW & pap_CW, both of which have long
2536 been included in previous releases.
2538 * The readdir_r and readdir64_r functions have been deprecated. It is
2539 recommended to use readdir and readdir64 instead.
2541 * The type âunion waitâ has been removed. It was deprecated in the early
2542 1990s and never part of POSIX. Application code should use the int type
2543 instead of âunion waitâ.
2545 * A new NSS action is added to facilitate large distributed system
2546 administration. The action, MERGE, allows remote user stores like LDAP
2547 to be merged into local user stores like /etc/groups in order to provide
2548 easy to use, updated, and managed sets of merged credentials. The new
2549 action can be used by configuring it in /etc/nsswitch.conf:
2550 group: files [SUCCESS=merge] nis
2551 Implemented by Stephen Gallagher (Red Hat).
2553 * The deprecated __malloc_initialize_hook variable has been removed from the
2556 * The long unused localedef --old-style option has been removed. It hasn't
2557 done anything in over 16 years. Scripts using this option can safely
2560 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2561 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2562 return the next representable value in the direction of positive infinity
2563 and the nextdown functions return the next representable value in the
2564 direction of negative infinity. These are currently enabled as GNU
2567 Security related changes:
2569 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2570 could result in a stack overflow when getnetbyname was called with an
2571 overly long name. (CVE-2016-3075)
2573 * Previously, getaddrinfo copied large amounts of address data to the stack,
2574 even after the fix for CVE-2013-4458 has been applied, potentially
2575 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2576 instead. Reported by Michael Petlan. (CVE-2016-3706)
2578 * The glob function suffered from a stack-based buffer overflow when it was
2579 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2580 Reported by Alexander Cherepanov. (CVE-2016-1234)
2582 * The Sun RPC UDP client could exhaust all available stack space when
2583 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2584 alloca plugin for GCC. (CVE-2016-4429)
2586 * The IPv6 name server management code in libresolv could result in a memory
2587 leak for each thread which is created, performs a failing naming lookup,
2588 and exits. Over time, this could result in a denial of service due to
2589 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2591 The following bugs are resolved with this release:
2593 [1170] localedata: ne_NP: update Nepali locale definition file
2594 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2596 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2597 [6796] math: fdim() does not set errno on overflow
2598 [10354] libc: posix_spawn should use vfork() in more cases than presently
2599 [11213] localedata: localedata: add copyright disclaimer to locale files
2600 [12143] localedata: chr_US: new Cherokee locale
2601 [12450] localedata: sgs_LT: new locale
2602 [12676] localedata: ln_CD: new locale
2603 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2605 [13304] math: fma, fmaf, fmal produce wrong results
2606 [14259] build: --localedir arg to configure is ignored
2607 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2608 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2609 [14934] localedata: es_CL: wrong first weekday chilean locale
2610 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2612 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2614 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2615 [15368] nptl: raise() is not async-signal-safe
2616 [15479] math: ceil, floor, round and trunc raise inexact exception
2617 [15578] localedata: kk_KZ: various updates
2618 [16003] localedata: pap_AN: punt old locale
2619 [16137] localedata: iw_IL: punt old locale
2620 [16190] localedata: eo: new esperanto locale
2621 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2622 [16742] malloc: race condition: pthread_atfork() called before first
2623 malloc() results in unexpected locking behaviour/deadlocks
2624 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2626 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2627 [17565] localedata: pt_PT: wrong (work-)week start
2628 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2629 [17950] build: Build fails with -msse
2630 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2631 [18433] libc: posix_spawn does not return correctly upon failure to
2633 [18453] localedata: charmaps/IBM875: incorrect codes
2634 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2636 [18896] localedata: he_IL: improvements for currency
2637 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2638 Romanian locale data
2639 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2641 [19056] libc: Deprecate readdir_r
2642 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2644 [19198] localedata: nl_NL: small improvements for Dutch locales
2645 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2646 nameservers (CVE-2016-5417)
2647 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2649 [19400] locale: Language missing in "iso-639.def", trivial fix in
2651 [19431] malloc: Deadlock between fflush, getdelim, and fork
2652 [19505] libc: Incorrect file descriptor validity checks in
2653 posix_spawn_file_actions_add{open,close,dup2}
2654 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2655 when using RTLD_NEXT
2656 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2657 `intl/{gettextP,loadinfo}.h'
2658 [19534] libc: execle, execlp may use malloc
2659 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2660 [19573] network: res_nclose and __res_maybe_init disagree about name
2661 server initialization, breaking Hesiod
2662 [19575] localedata: Status of GB18030 tables
2663 [19581] localedata: sr_* date_fmt string contains additional newline
2664 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2666 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2667 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2668 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2669 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2671 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2673 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2675 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2676 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2677 [19633] locale: strfmon_l applies global locale to number formatting
2678 [19642] network: Memory leak in getnameinfo
2679 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2680 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2682 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2683 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2685 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2686 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2688 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2690 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2692 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2693 pointers and lengths in error-case.
2694 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2695 report errors on UTF-16 surrogates values.
2696 [19755] nscd: nscd assertion failure in gc
2697 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2698 [19759] libc: mempcpy shouldn't be inlined
2699 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2700 [19765] libc: s390 needs an optimized mempcpy
2701 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2702 NAME_MAX limit assumption (CVE-2016-1234)
2703 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2704 [19787] network: Missing and incorrect truncation checks in getnameinfo
2705 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2707 [19791] network: Assertion failure in res_query.c with un-connectable name
2709 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2710 [19822] math: libm.so install clobbers old version
2711 [19825] network: resolv: send_vc can return uninitialized data in second
2712 response to getaddrinfo
2713 [19830] network: nss_dns: should check RDATA length against buffer length
2714 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2715 confronted with A/AAAA records of invalid size
2716 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2717 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2718 [19853] stdio: Printing IBM long double in decimal with high precision is
2720 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2721 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2722 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2724 [19865] network: Assertion failure or memory leak in
2725 _nss_dns_getcanonname_r
2726 [19868] network: nss_dns: netent code does not skip over non-PTR records
2727 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2729 [19881] string: Improve x86-64 memset
2730 [19907] string: Incorrect memcpy tests
2731 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2733 [19925] libc: termios.h XCASE namespace
2734 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2735 [19929] libc: limits.h NL_NMAX namespace
2736 [19931] stdio: Memory leak in vfprintf
2737 [19957] libc: clone(CLONE_VM) access invalid parent memory
2738 [19963] localedata: en_IL: New locale
2739 [19989] stdio: stdio.h cuserid namespace
2740 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2742 [19996] locale: langinfo.h nl_langinfo_l namespace
2743 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2744 [20010] network: getaddrinfo: Stack overflow in hostent translation
2746 [20012] stdio: libio: fmemopen append mode failure
2747 [20014] stdio: stdio.h namespace for pre-threads POSIX
2748 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2749 [20023] libc: fcntl.h timespec namespace
2750 [20024] math: [x86_64] vectorized sincos trashes the stack
2751 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2752 [20041] time: sys/time.h timespec namespace
2753 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2754 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2755 [20051] libc: ttyslot in wrong header under wrong conditions
2756 [20054] libc: gethostname not declared for XPG4
2757 [20055] libc: termios.h missing tcgetsid for XPG4
2758 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2760 [20073] libc: sys/stat.h fchmod namespace
2761 [20074] libc: stdlib.h rand_r namespace
2762 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2763 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2765 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2766 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2768 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2769 [20119] libc: Wrong mask for processors level type from CPUID
2770 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2771 AS not supporting AVX512
2772 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2774 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2775 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2777 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2778 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2779 [20178] libc: posix_spawn{p} should not call exit
2780 [20191] stdio: libio: vtables hardening
2781 [20195] string: FMA4 detection requires CPUID execution with register
2783 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2784 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2786 [20212] math: acos (sNaN) returns sNaN
2787 [20213] math: asin (sNaN) returns sNaN
2788 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2789 [20218] math: [i386] asinhl (sNaN) returns sNaN
2790 [20219] math: [i386] atanhl (sNaN) returns sNaN
2791 [20222] stdio: fopencookie: Mangle function pointers
2792 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2793 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2794 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2796 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2797 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2798 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2799 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2800 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2801 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2802 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2803 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2804 [20240] math: modf (sNaN) returns sNaN
2805 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2806 [20250] math: frexp (sNaN) returns sNaN
2807 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2808 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2810 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2811 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2812 subscript is below array bounds [-Werror=array-bounds]
2813 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2814 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2816 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2817 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2819 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2820 "invalid" exceptions
2821 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2822 [20316] localedata: id_ID: Februari instead of Pebruari
2823 [20327] string: POWER8 strcasecmp returns incorrect result
2824 [20347] math: Failure: Test: j0_downward (0xap+0)
2825 [20348] libc: FAIL: misc/tst-preadvwritev64
2826 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2827 [20350] libc: There is no test for p{read,write}64
2828 [20357] math: Incorrect cos result for 1.5174239687223976
2829 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2833 * Unicode 8.0.0 Support: Character encoding, character type info, and
2834 transliteration tables are all updated to Unicode 8.0.0, using new
2835 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2836 These updates cause user visible changes, such as the fixes for bugs
2837 89, 16061, and 18568.
2839 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2840 kernel-internal CPU set size. This means that requests that change the
2841 CPU affinity which failed before (for example, an all-ones CPU mask) will
2842 now succeed. Applications that need to determine the effective CPU
2843 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2844 setting it because the kernel can adjust it (and the previous size check
2845 would not detect this in the majority of cases).
2847 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2848 the following new symbols are used: fts64_children, fts64_close,
2849 fts64_open, fts64_read and fts64_set.
2851 * getaddrinfo now detects certain invalid responses on an internal netlink
2852 socket. If such responses are received, an affected process will
2853 terminate with an error message of "Unexpected error <number> on netlink
2854 descriptor <number>" or "Unexpected netlink response of size <number> on
2855 descriptor <number>". The most likely cause for these errors is a
2856 multi-threaded application which erroneously closes and reuses the netlink
2857 file descriptor while it is used by getaddrinfo.
2859 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2860 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2861 unnecessary serialization of memory allocation requests across threads.
2862 The defect is now corrected. Users should see a substantial increase in
2863 the concurent throughput of allocation requests for applications which
2864 trigger this bug. Affected applications typically create and
2865 destroy threads frequently. (Bug 19048 was reported and analyzed by
2868 * There is now a --disable-timezone-tools configure option for disabling the
2869 building and installing of the timezone related utilities (zic, zdump, and
2870 tzselect). This is useful for people who build the timezone data and code
2871 independent of the GNU C Library.
2873 * The obsolete header <regexp.h> has been removed. Programs that require
2874 this header must be updated to use <regex.h> instead.
2876 * The obsolete functions bdflush, create_module, get_kernel_syms,
2877 query_module and uselib are no longer available to newly linked binaries;
2878 the header <sys/kdaemon.h> has been removed. These functions and header
2879 were specific to systems using the Linux kernel and could not usefully be
2880 used with the GNU C Library on systems with version 2.6 or later of the
2883 * Optimized string, wcsmbs and memory functions for IBM z13.
2884 Implemented by Stefan Liebler.
2886 * Newly linked programs that define a variable called signgam will no longer
2887 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2888 require signgam to be set by those functions must ensure that they use the
2889 variable provided by the GNU C Library and declared in <math.h>, without
2890 defining their own copy.
2892 * The minimum GCC version that can be used to build this version of the GNU
2893 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2894 still be used to compile programs using the GNU C Library.
2896 Security related changes:
2898 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2899 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2901 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2902 the pointer guard feature. It is always enabled. Previously,
2903 LD_POINTER_GUARD could be used to disable security hardening in binaries
2904 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2907 * An integer overflow in hcreate and hcreate_r could lead to an
2908 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2910 * The catopen function no longer has unbounded stack usage. Reported by
2911 Max. (CVE-2015-8779)
2913 * The nan, nanf and nanl functions no longer have unbounded stack usage
2914 depending on the length of the string passed as an argument to the
2915 functions. Reported by Joseph Myers. (CVE-2014-9761)
2917 * A stack-based buffer overflow was found in libresolv when invoked from
2918 libnss_dns, allowing specially crafted DNS responses to seize control
2919 of execution flow in the DNS client. The buffer overflow occurs in
2920 the functions send_dg (send datagram) and send_vc (send TCP) for the
2921 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2922 family. The use of AF_UNSPEC triggers the low-level resolver code to
2923 send out two parallel queries for A and AAAA. A mismanagement of the
2924 buffers used for those queries could result in the response of a query
2925 writing beyond the alloca allocated buffer created by
2926 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2927 the overflow. Thanks to the Google Security Team and Red Hat for
2928 reporting the security impact of this issue, and Robert Holiday of
2929 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2931 The following bugs are resolved with this release:
2933 [89] localedata: Locales nb_NO and nn_NO should transliterate ÊÞÄ
2934 [887] math: Math library function "logb" and "nextafter" inconsistent
2935 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2936 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2937 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2938 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2940 [4404] localedata: German translation of "Alarm clock" is misleading
2941 [6799] math: nextafter() and nexttoward() doen't set errno on
2942 overflow/underflow errors
2943 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2945 [10432] nis: _nss_nis_setnetgrent assertion failure
2946 [11460] libc: fts has no LFS support
2947 [12926] network: getaddrinfo()/make_request() may spin forever
2948 [13065] nptl: Race condition in pthread barriers
2949 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2950 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2952 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2953 [14912] libc: Rename non-installed bits/*.h headers
2954 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2955 [15367] math: Let gcc use __builtin_isinf
2956 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2957 [15421] math: lgamma wrongly sets signgam for ISO C
2958 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2959 FE_INVALID with argument out of range
2960 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2962 [15786] dynamic-link: ifunc resolver functions can smash function
2964 [15918] math: Unnecessary check for equality in hypotf()
2965 [16061] localedata: Review / update transliteration data
2966 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2968 [16141] time: strptime %z offset restriction
2969 [16171] math: drem should be alias of remainder
2970 [16296] math: fegetround is pure?
2971 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2972 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2974 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2975 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2977 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2978 "Exception "Inexact" set" on ppc32
2979 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2980 [16517] math: Missing underflow exception from tanf/tan/tanl
2981 [16519] math: Missing underflow exception from sinhf
2982 [16520] math: Missing underflow exception from tanhf
2983 [16521] math: Missing underflow exception from exp2
2984 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2986 [16734] stdio: fopen calls mmap to allocate its buffer
2987 [16961] math: nan function incorrect handling of bad sequences
2988 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2989 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
2990 [16985] locale: localedef: confusing error message when opening output
2992 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
2993 [17197] locale: Redundant shift character in iconv conversion output at
2995 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
2996 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
2997 [17250] dynamic-link: static linking breaks nss loading
2998 (getaddrinfo/getpwnam/etc...)
2999 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
3001 [17441] math: isnan() should use __builtin_isnan() in GCC
3002 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
3003 (related to lock elision)
3004 [17787] manual: Exponent on page 324 of the PDF ends prematurely
3005 [17886] time: strptime should be able to parse "Z" as a timezone with %z
3006 [17887] time: strptime should be able to parse "+01:00" style timezones
3007 [17905] libc: catopen() Multiple unbounded stack allocations
3009 [18084] libc: backtrace (..., 0) dumps core on x86
3010 [18086] libc: nice() sets errno to 0 on success
3011 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
3012 is too large (CVE-2015-8778)
3013 [18251] dynamic-link: SONAME missing when audit modules provides path
3014 [18265] libc: add attributes for wchar string and memory functions
3015 [18370] math: csqrt missing underflows
3016 [18421] libc: [hppa] read-only segment has dynamic relocations
3017 [18472] libc: Obsolete syscall wrappers should be compat symbols
3018 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3019 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3020 [18525] localedata: Remove locale timezone information
3021 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3022 [18568] localedata: Update locale data to Unicode 8.0
3023 [18589] locale: sort-test.sh fails at random
3024 [18595] math: ctan, ctanh missing underflows
3025 [18604] libc: assert macro-expands its argument
3026 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3027 contains a vector instruction exception.
3028 [18611] math: j1, jn missing errno setting on underflow
3029 [18618] localedata: sync Chechen locale definitions with other *_RU
3031 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3032 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3033 [18665] network: In send_dg, the recvfrom function is NOT always using the
3034 buffer size of a newly created buffer (CVE-2015-7547)
3035 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3037 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3039 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3040 [18699] math: tilegx cproj() for various complex infinities does not yield
3042 [18724] libc: Harden put*ent functions against data injection
3043 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3044 [18755] build: build errors with -DNDEBUG
3045 [18757] stdio: fmemopen fails to set errno on failure
3046 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3048 [18781] libc: openat64 lacks O_LARGEFILE
3049 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3050 error: canât find a register in class âR1_REGSâ while reloading âasmâ
3051 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3052 [18790] math: [ldbl-128ibm] tanhl inaccurate
3053 [18795] libc: stpncpy fortification misses buffer lengths that are
3054 statically too large
3055 [18796] build: build fails for --disable-mathvec
3056 [18803] math: hypot missing underflows
3057 [18820] stdio: fmemopen may leak memory on failure
3058 [18823] math: csqrt spurious underflows
3059 [18824] math: fma spurious underflows
3060 [18825] math: pow missing underflows
3061 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3062 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3063 [18870] build: sem_open.c fails to compile with missing symbol
3065 [18872] stdio: Fix memory leak in printf_positional
3066 [18873] libc: posix_fallocate overflow check ineffective
3067 [18875] math: Excess precision leads incorrect libm
3068 [18877] libc: arm: mmap offset regression
3069 [18887] libc: memory corruption when using getmntent on blank lines
3070 [18918] localedata: hu_HU: change time to HH:MM:SS format
3071 [18921] libc: Regression: extraneous stat() and fstat() performed by
3073 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3074 binaries (CVE-2015-8777)
3075 [18951] math: tgamma missing underflows
3076 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3078 [18953] localedata: lt_LT: change currency symbol to the euro
3079 [18956] math: powf inaccuracy
3080 [18961] math: [i386] exp missing underflows
3081 [18966] math: [i386] exp10 missing underflows
3082 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3083 [18969] build: multiple string test failures due to missing locale
3085 [18970] libc: Reference of pthread_setcancelstate in libc.a
3086 [18977] math: float / long double Bessel functions not in XSI POSIX
3087 [18980] math: i386 libm functions return with excess range and precision
3088 [18981] math: i386 scalb*, ldexp return with excess range and precision
3089 [18982] stdio: va_list and vprintf
3090 [18985] time: Passing out of range data to strftime() causes a segfault
3092 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3093 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3094 [19012] locale: iconv_open leaks memory on error path
3095 [19016] math: clog, clog10 inaccuracy
3096 [19018] nptl: Mangle function pointers in tls_dtor_list
3097 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3098 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3099 [19048] malloc: malloc: arena free list can become cyclic, increasing
3101 [19049] math: [powerpc] erfc incorrect zero sign
3102 [19050] math: [powerpc] log* incorrect zero sign
3103 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3104 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3105 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3106 [19074] network: Data race in _res_hconf_reorder_addrs
3107 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3108 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3109 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3111 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3113 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3114 [19086] manual: posix_fallocate64 documented argument order is wrong.
3115 [19088] math: lround, llround missing exceptions close to overflow
3117 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3118 [19095] math: dbl-64 lrint incorrect for 64-bit long
3119 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3120 [19124] dynamic-link: ld.so failed to build with older assmebler
3121 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3122 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3123 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3124 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3125 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3126 pthread_setaffinity_np
3127 [19156] math: [ldbl-128] j0l spurious underflows
3128 [19164] nptl: tst-getcpu fails with many possible CPUs
3129 [19168] math: math/test-ildoubl and math/test-ldouble failure
3130 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3131 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3133 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3134 (FE_NOMASK_ENV) do not clear SSE exceptions
3135 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3136 _int_new_arena/reused_arena
3137 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
3138 [19201] math: dbl-64 remainder incorrect sign of zero result
3139 [19205] math: bits/math-finite.h conditions do not match math.h and
3141 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
3142 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
3143 for C99-based standards
3144 [19212] libc: features.h not -Wundef clean
3145 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
3147 [19214] libc: Family and model identification for AMD CPU's are incorrect.
3148 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
3149 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
3151 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
3152 "inexact" exceptions
3153 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
3155 [19242] libc: strtol incorrect in Turkish locales
3156 [19243] malloc: reused_arena can pick an arena on the free list, leading
3157 to an assertion failure and reference count corruption
3158 [19253] time: tzset() ineffective when temporary TZ did not include DST
3160 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
3161 [19270] math: [hppa] Shared libm missing __isnanl
3162 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
3163 MAP_HUGETLB and MAP_STACK defines
3164 [19313] nptl: Wrong __cpu_mask for x32
3165 [19347] libc: grantpt: try to force a specific gid even without pt_chown
3166 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
3167 [19350] math: [ldbl-128ibm] sinhl spurious overflows
3168 [19351] math: [ldbl-128ibm] logl inaccurate near 1
3169 [19363] time: x32: times() return value wrongly truncates/sign extends
3171 [19367] dynamic-link: Improve branch prediction on Silvermont
3172 [19369] network: Default domain name not reset by res_ninit when "search"
3173 / "domain" entry is removed from resolv.conf
3174 [19375] math: powerpc: incorrect results for POWER7 logb with negative
3176 [19385] localedata: bg_BG: time separator should be colon, not comma
3177 [19408] libc: linux personality syscall wrapper may erroneously return an
3178 error on 32-bit architectures
3179 [19415] libc: dladdr returns wrong names on hppa
3180 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
3181 IBM905, IBM907, and IBM909
3182 [19439] math: Unix98 isinf and isnan functions conflict with C++11
3183 [19443] build: build failures with -DDEBUG
3184 [19451] build: Make check fails on test-double-vlen2
3185 [19462] libc: Glibc failed to build with -Os
3186 [19465] math: Wrong code with -Os
3187 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
3189 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
3191 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
3192 [19486] math: S390: Math tests fail with "Exception Inexact set".
3193 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
3194 [19550] libc: [mips] mmap negative offset handling inconsistent with other
3196 [19590] math: Fail to build shared objects that use libmvec.so functions.
3200 * The following bugs are resolved with this release:
3202 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
3203 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
3204 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
3205 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
3206 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
3207 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
3208 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
3209 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
3210 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
3211 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
3212 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
3213 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
3214 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
3215 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
3216 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
3217 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
3218 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
3219 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
3220 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
3221 18657, 18676, 18694, 18696, 18887.
3223 * Cache information can be queried via sysconf() function on s390 e.g. with
3224 _SC_LEVEL1_ICACHE_SIZE as argument.
3226 * A buffer overflow in gethostbyname_r and related functions performing DNS
3227 requests has been fixed. If the NSS functions were called with a
3228 misaligned buffer, the buffer length change due to pointer alignment was
3229 not taken into account. This could result in application crashes or,
3230 potentially arbitrary code execution, using crafted, but syntactically
3231 valid DNS responses. (CVE-2015-1781)
3233 * The time zone file parser has been made more robust against crafted time
3234 zone files, avoiding heap buffer overflows related to the processing of
3235 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3236 large time zone data files. Overly long time zone specifiers in the TZ
3237 variable no longer result in stack overflows and crashes.
3239 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3240 for LD and GD on x86 and x86-64, has been implemented. You will need
3241 binutils-2.24 or later to enable this optimization.
3243 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3244 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3245 Hat). These updates cause user visible changes, such as the fix for bug
3248 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3249 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3250 condition in some applications.
3252 * Added vector math library named libmvec with the following vectorized x86_64
3253 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3255 The library can be disabled with --disable-mathvec. Use of the functions is
3256 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3257 Shared library libmvec.so is linked in as needed when using -lm (no need to
3258 specify -lmvec explicitly for not static builds).
3259 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3261 * A new fmemopen implementation has been added with the goal of POSIX
3262 compliance. The new implementation fixes the following long-standing
3263 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3264 old implementation is still present for use be by existing binaries.
3266 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3267 releases. It has been fixed to match 2.19 and older, but binaries built
3268 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3270 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3271 Contributed by Roland McGrath (Google).
3273 * The header <regexp.h> is deprecated, and will be removed in a future
3274 release. Use of this header will trigger a deprecation warning.
3275 Application developers should update their code to use <regex.h> instead.
3277 This header was formerly part of SUS, but was deprecated in 1994 and
3278 removed from the standard in 2001. Also, the glibc implementation
3279 leaks memory. See BZ#18681 for more details.
3283 * The following bugs are resolved with this release:
3285 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3286 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3287 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3288 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3289 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3290 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3291 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3292 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3293 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3294 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3297 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3298 too little memory for the to-be-scanned arguments and overflow the
3299 allocated buffer. The implementation now correctly computes the required
3300 buffer size when using malloc, and switches to malloc from alloca as
3303 * A new semaphore algorithm has been implemented in generic C code for all
3304 machines. Previous custom assembly implementations of semaphore were
3305 difficult to reason about or ensure that they were safe. The new version
3306 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3307 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3308 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3310 * Port to Altera Nios II has been contributed by Mentor Graphics.
3312 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3313 implementations for powerpc64/powerpc64le.
3314 Implemented by Adhemerval Zanella (IBM).
3316 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3317 and powerpc64le. This may improve lock scaling of existing programs on
3318 HTM capable systems. The lock elision code is only enabled with
3319 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3320 powerpc will issue a transaction abort on every syscall to avoid side
3321 effects being visible outside transactions.
3323 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3324 AArch64. Contributed by ARM Ltd.
3326 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3328 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3329 under certain input conditions resulting in the execution of a shell for
3330 command substitution when the application did not request it. The
3331 implementation now checks WRDE_NOCMD immediately before executing the
3332 shell and returns the error WRDE_CMDSUB as expected.
3334 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3335 processing format strings with a large number of format specifiers.
3337 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3338 infinite loop if the DNS response contained a PTR record of an unexpected
3341 * The minimum GCC version that can be used to build this version of the GNU
3342 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3343 still be used to compile programs using the GNU C Library.
3345 * The GNU C Library is now built with -Werror by default. This can be
3346 disabled by configuring with --disable-werror.
3348 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3350 * The obsolete sigvec function has been removed. This was the original
3351 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3352 programs have been using instead for about 25 years. Of course, ABI
3353 compatibility for old binaries using sigvec remains intact.
3355 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3356 with newer versions of bison.
3358 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3359 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3360 registers overlay two consecutive single-precision registers. MIPS32R2
3361 introduced a new FPU mode (FR=1) where double-precision registers extend the
3362 corresponding single-precision registers which is incompatible with the
3363 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3364 require the use of FR=1 making a transition necessary. New o32 ABI
3365 extensions enable users to migrate over time from the original o32 ABI
3366 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3367 tracks the ABI of any loaded object and verifies that new objects are
3368 compatible. Mode transitions will also be requested as required and
3369 unsupportable objects will be rejected. The ABI checks include both soft and
3370 hard float ABIs for o32, n32 and n64.
3372 GCC 5 with GNU binutils 2.25 onwards:
3373 It is strongly recommended that all o32 system libraries are built using the
3374 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3375 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3376 compiler using --with-fp-32=xx to set this by default.
3380 * The following bugs are resolved with this release:
3382 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3383 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3384 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3385 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3386 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3387 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3388 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3389 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3390 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3391 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3392 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3393 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3394 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3395 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3396 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3398 * Reverted change of ABI data structures for s390 and s390x:
3399 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3400 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3401 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3402 are preserved pointing straight to the same implementation as the old ones.
3403 Given that, new callers will simply provide a too-big buffer to these
3404 functions. Any applications/libraries out there that embed jmp_buf or
3405 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3406 against 2.19 headers will have to rebuilt again. This is necessary in any
3407 case to revert the breakage in their ABI caused by the glibc change.
3409 * Support for file description locks is added to systems running the
3410 Linux kernel. The standard file locking interfaces are extended to
3411 operate on file descriptions, not file descriptors, via the use of
3412 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3413 are associated with an open file instead of a process.
3415 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3417 * The minimum Linux kernel version that this version of the GNU C Library
3418 can be used with is 2.6.32.
3420 * Running the testsuite no longer terminates as soon as a test fails.
3421 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3422 with PASS or FAIL lines for individual tests. A summary of the results is
3423 printed, including a list of failing lists, and "make check" exits with
3424 error status if there were any unexpected failures. "make check
3425 stop-on-test-failure=y" may be used to keep the old behavior.
3427 * The am33 port, which had not worked for several years, has been removed
3430 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3431 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3432 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3433 conflicted with POSIX (support for which was removed in 2.19), the
3434 interfaces those macros enabled remain available when compiling with
3435 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3436 test macros defined.
3438 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3440 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3441 This may improve lock scaling of existing programs on TX capable systems.
3442 The lock elision code is only built with --enable-lock-elision=yes and
3443 then requires a GCC version supporting the TX builtins. With lock elision
3444 default mutexes are elided via __builtin_tbegin, if the cpu supports
3445 transactions. By default lock elision is not enabled and the elision code
3448 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3449 copy the path argument. This allowed programs to cause posix_spawn to
3450 deference a dangling pointer, or use an unexpected pathname argument if
3451 the string was modified after the posix_spawn_file_actions_addopen
3454 * All supported architectures now use the main glibc sysdeps directory
3455 instead of some being in a separate "ports" directory (which was
3456 distributed separately before glibc 2.17).
3458 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3459 On configurations that support it (all Linux configurations), it's now
3460 used regardless of the --enable-add-ons switch to configure. It is no
3461 longer possible to build such configurations without pthreads support.
3463 * Locale names, including those obtained from environment variables (LANG
3464 and the LC_* variables), are more tightly checked for proper syntax.
3465 setlocale will now fail (with EINVAL) for locale names that are overly
3466 long, contain slashes without starting with a slash, or contain ".." path
3467 components. (CVE-2014-0475) Previously, some valid locale names were
3468 silently replaced with the "C" locale when running in AT_SECURE mode
3469 (e.g., in a SUID program). This is no longer necessary because of the
3472 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3473 with application code using Intel MPX instructions. (With all previous
3474 versions, the MPX register state could be clobbered when making calls
3475 into or out of a shared library.) Note that while the new dynamic
3476 linker is compatible with all known x86 hardware whether or not it
3477 supports Intel MPX, some x86 instruction-set emulators might fail to
3478 handle the new instruction encodings. This is known to affect Valgrind
3479 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3480 release), and might affect other tools that do instruction emulation.
3482 * Support for loadable gconv transliteration modules has been removed.
3483 The support for transliteration modules has been non-functional for
3484 over a decade, and the removal is prompted by security defects. The
3485 normal gconv conversion modules are still supported. Transliteration
3486 with //TRANSLIT is still possible, and the //IGNORE specifier
3487 continues to be supported. (CVE-2014-5119)
3489 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3490 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3491 resulting a denial-of-service security vulnerability in applications which
3492 use functions related to iconv. (CVE-2014-6040)
3496 * The following bugs are resolved with this release:
3498 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3499 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3500 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3501 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3502 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3503 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3504 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3505 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3506 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3507 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3508 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3509 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3510 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3511 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3512 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3513 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3514 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3515 16431, 16453, 16474, 16506, 16510, 16529
3517 * Slovenian translations for glibc messages have been contributed by the
3518 Translation Project's Slovenian team of translators.
3520 * The public headers no longer use __unused nor __block. This change is to
3521 support compiling programs that are derived from BSD sources and use
3522 __unused internally, and to support compiling with Clang's -fblock
3523 extension which uses __block.
3525 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3526 large collation sequences to optimize multiple passes. This cache
3527 computation may overflow for large collation sequences and may cause a
3528 stack or buffer overflow. This is now fixed to use a slower algorithm
3529 which does not use a cache if there is an integer overflow.
3531 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3532 rules for large collation sequences to optimize multiple passes and falls
3533 back to alloca if malloc fails, resulting in a possible stack overflow.
3534 The implementation now falls back to an uncached collation sequence lookup
3537 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3538 initialized for static applications resulting in the security feature
3539 being disabled. The pointer guard is now correctly initialized to a
3540 random value for static applications. Existing static applications need
3541 to be recompiled to take advantage of the fix (bug 15754).
3543 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3544 to the d_name member of struct dirent, or omit the terminating NUL
3545 character. (Bugzilla #14699).
3547 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3548 aligned_alloc functions could allocate too few bytes or corrupt the
3549 heap when passed very large allocation size values (Bugzilla #15855,
3552 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3553 for AF_INET6 has been fixed (Bugzilla #16072).
3555 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3556 pap_CW, quz_PE, the_NP.
3558 * Substantially revised locales: gd_GB, ht_HT
3560 * The LC_ADDRESS field was updated to support country_car for almost all
3563 * ISO 1427 definitions were updated.
3565 * ISO 3166 definitions were updated.
3567 * The localedef utility now supports --big-endian and --little-endian
3568 command-line options to generate locales for a different system from that
3569 for which the C library was built.
3571 * Binary locale files now only depend on the endianness of the system for
3572 which they are generated and not on other properties of that system. As a
3573 consequence, binary files generated with new localedef may be incompatible
3574 with old versions of the GNU C Library, and binary files generated with
3575 old localedef may be incompatible with this version of the GNU C Library,
3576 in the following circumstances:
3578 + Locale files may be incompatible on m68k systems.
3580 + Locale archive files (but not separate files for individual locales) may
3581 be incompatible on systems where plain "char" is signed.
3583 * The configure option --disable-versioning has been removed. Builds with
3584 --disable-versioning had not worked for several years.
3586 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3587 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3589 * SystemTap probes for malloc have been introduced.
3591 * SystemTap probes for slow multiple precision fallback paths of
3592 transcendental functions have been introduced.
3594 * Support for powerpc64le has been added.
3596 * The soft-float powerpc port now supports e500 processors.
3598 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3600 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3601 set of header declarations that are enabled by default, even when other
3602 feature test macros or compiler options such as -std=c99 would otherwise
3603 disable some of those declarations.
3605 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3606 conflict with POSIX. The libbsd-compat library (which was a dummy library
3607 that did nothing) has also been removed.
3609 * Preliminary documentation about Multi-Thread, Async-Signal and
3610 Async-Cancel Safety has been added.
3612 * Change of ABI data structures for s390 and s390x:
3613 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3614 allow for future hardware extensions. All library functions that accept or
3615 return these structures were versioned in order to provide backwards
3616 compatibility with existing code. However, not all cases can be handled
3617 with interface versioning. If an application embeds either structure into
3618 another structure and that structure is passed to another compilation unit
3619 which expects the newer larger-sized object then any access to the new
3620 fields will result in undefined behaviour. Similarly any access to fields
3621 that were moved by the enlarging of the structures will cause undefined
3622 behaviour. To fix the undefined behaviour all objects that are part of the
3623 final in-memory image must agree on the size of structures, and this may
3624 require recompilation.
3628 * The following bugs are resolved with this release:
3630 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3631 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3632 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3633 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3634 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3635 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3636 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3637 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3638 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3639 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3640 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3641 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3642 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3645 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3646 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3647 Distributions can re-enable building and using pt_chown via the new configure
3648 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3649 considerable security risks and should only be used if the distribution
3650 understands and accepts the risks.
3652 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3655 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3656 fixed (Bugzilla #15330).
3658 * Add support for calling C++11 thread_local object destructors on thread
3659 and program exit. This needs compiler support for offloading C++11
3660 destructor calls to glibc.
3662 * Improved worst case performance of libm functions with double inputs and
3665 * Support for priority inherited mutexes in pthread condition variables on
3666 non-x86 architectures.
3668 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3670 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3672 * Optimized string functions for ARM. Implemented by Will Newton and
3675 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3677 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3680 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3681 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3683 * Added a benchmark framework to track performance of functions in glibc.
3685 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3686 It is based on draft TS 18661 and currently enabled as a GNU extension.
3688 * On Linux, the clock function now uses the clock_gettime system call
3689 for improved precision, rather than old times system call.
3691 * Added support for version-3 tz format files. This is needed when using
3692 the tz database release 2013e or later, and affects a few unusual cases --
3693 currently only TZ='America/Godthab' for time stamps after 2037.
3695 * Added new API functions pthread_getattr_default_np and
3696 pthread_setattr_default_np to get and set the default pthread
3697 attributes of a process.
3699 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3700 This may improve lock scaling of existing programs on TSX capable systems.
3701 When the --enable-lock-elision=yes parameter is specified at configure
3702 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3705 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3706 availability). Implemented by Ryan S. Arnold.
3708 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3712 * The following bugs are resolved with this release:
3714 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3715 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3716 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3717 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3718 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3719 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3720 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3721 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3722 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3723 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3724 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3725 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3726 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3727 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3728 14879, 14889, 14893, 14898, 14914.
3730 * Optimization of memcpy for MIPS.
3732 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3733 EMFILE has been fixed (Bugzilla #14889).
3735 * The add-on ports collection is now distributed in the "ports" subdirectory
3736 of the main GNU C Library distribution, rather than separately.
3738 * Port to ARM AArch64 contributed by Linaro.
3740 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3741 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3743 Implemented by Andreas Krebbel.
3745 * The new function secure_getenv allows secure access to the environment,
3746 returning NULL if running in a SUID/SGID process. This function replaces
3747 the internal function __secure_getenv.
3749 * SystemTap static probes have been added into the dynamic linker.
3750 Implemented by Gary Benson.
3752 * Optimizations of string functions strstr, strcasestr and memmem.
3753 Implemented by Maxim Kuvyrkov.
3755 * The minimum Linux kernel version that this version of the GNU C Library
3756 can be used with is 2.6.16.
3758 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3759 powerpc POWER7. Implemented by Will Schmidt.
3761 * New configure option --disable-nscd builds the C library such that it
3762 never attempts to contact the Name Service Caching Daemon (nscd).
3763 New configure option --disable-build-nscd avoids building nscd itself;
3764 this is the default if --disable-nscd is used.
3766 * Improved support for cross-compilation, including cross-testing and
3767 bootstrap builds without a previously built glibc.
3769 * Several testsuite tests are now able to test multiple IFUNC variants of an
3770 interface, rather than just testing the one that would be chooen by
3773 * New configure options --with-bugurl and --with-pkgversion, for
3774 distributors to use to embed their bug-reporting and package version
3775 information in --help and --version output.
3777 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3778 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3779 allows creation of chroots without the procfs mounted on /proc.
3781 * The `crypt' function now fails if passed salt bytes that violate the
3782 specification for those values. On Linux, the `crypt' function will
3783 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3784 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3785 when the mode is enabled.
3787 * The `clock_*' suite of functions (declared in <time.h>) is now available
3788 directly in the main C library. Previously it was necessary to link with
3789 -lrt to use these functions. This change has the effect that a
3790 single-threaded program that uses a function such as `clock_gettime' (and
3791 is not linked with -lrt) will no longer implicitly load the pthreads
3792 library at runtime and so will not suffer the overheads associated with
3793 multi-thread support in other code such as the C++ runtime library.
3795 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3800 * The following bugs are resolved with this release:
3802 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3803 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3804 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3805 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3806 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3807 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3808 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3809 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3810 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3811 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3812 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3813 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3814 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3815 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3816 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3817 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3818 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3819 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3820 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3821 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3822 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3823 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3826 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3827 configuring glibc with:
3828 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3829 Visit <https://sites.google.com/site/x32abi/> for more x32 ABI info.
3830 Implemented by H.J. Lu.
3834 + define static_assert
3836 + do not declare gets
3838 + declare at_quick_exit and quick_exit also for ISO C11
3840 + aligned_alloc. NB: The code is deliberately allows the size parameter
3841 to not be a multiple of the alignment. This is a moronic requirement
3842 in the standard but it is only a requirement on the caller, not the
3845 + timespec_get added
3847 + uchar.h support added
3849 + CMPLX, CMPLXF, CMPLXL added
3851 Implemented by Ulrich Drepper.
3853 * Support for the IA-64 has been moved to ports.
3855 * Remove support for anything but ELF binary format
3857 * Checking versions of poll, ppoll added.
3858 Implemented by Ulrich Drepper.
3860 * More generic and 64-bit performance optimizations to math functions.
3861 Implemented by Ulrich Drepper.
3863 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3864 headers and functions available at compile time as they were before
3865 version 2.14. This option will be removed at some time in the future
3866 after the TI-RPC library becomes fully sufficient for the needs of
3867 existing applications.
3869 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3870 Note that glibc is not expected to work with any Linux kernel version
3873 * New header <sys/auxv.h> and function getauxval allowing easy access to
3874 the AT_* key-value pairs passed from the Linux kernel. The header also
3875 defines the HWCAP_* bits associated with the AT_HWCAP key.
3877 * New locales: mag_IN
3879 * New configure option --enable-systemtap builds SystemTap static probes
3880 into libc for setjmp and longjmp and into libpthread for various operations.
3881 So far the setjmp/longjmp probes and some of the libpthread probes are
3882 provided only for i*86 and x86_64.
3883 Implemented by Roland McGrath and Rayson Ho.
3885 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3887 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3890 * More optimized functions for SPARC. Implemented by David S. Miller.
3892 * Improved support for cross-compilation, especially bootstrap builds
3893 without a previously built glibc.
3895 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3896 Chris Metcalf from Tilera.
3898 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3899 now supported for ARM processors.
3901 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3902 as the name of the dynamic linker, to distinguish it from the
3903 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3905 * Support for CRIS has been removed from ports.
3907 * A new class of installed header has been documented for low-level
3908 platform-specific functionality. PowerPC added the first instance with a
3909 function to provide time base register access. Contributed by Tulio
3910 Magno Quites Machado Filho.
3912 * ix86 configurations now install header files that are consistent with
3913 what x86-64 configurations install. These same header files can be used
3914 for -m32, -m64, or -mx32 builds.
3915 Contributed by H.J. Lu.
3917 * Math library bug fixes. A thorough audit of all open math library bugs was
3918 conducted by Joseph Myers. Significant progress was made on many math
3919 library bugs resulting in more accurate exceptions and function results.
3920 Many thanks to all those that contributed including Andreas Jaeger for his
3921 patch review and work on the x87 trigonometric instruction issues.
3923 * Timezone data is no longer installed. Timezone-related binaries and scripts
3924 will continue to be installed. Users should obtain their timezone data from
3925 their distribution provider or from the tzdata package at
3926 <ftp://munnari.oz.au/pub/>.
3930 * The following bugs are resolved with this release:
3932 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3933 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3934 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3935 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3936 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3937 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3938 13484, 13506, 13515, 13523, 13524, 13538, 13540
3940 * New program pldd to list loaded object of a process
3941 Implemented by Ulrich Drepper.
3943 * Add nss_db support back to glibc. No more dependency on Berkeley db
3944 and support for initgroups lookups.
3945 Implemented by Ulrich Drepper.
3947 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3948 Contributed by HJ Lu.
3950 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3951 Contributed by HJ Lu.
3953 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3954 on x86-32 and x86-64.
3955 Contributed by Liubov Dmitrieva.
3957 * Optimized strchr and strrchr for SSE on x86-32.
3958 Contributed by Liubov Dmitrieva.
3960 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3961 for x86-64 and x86-32.
3962 Contributed by Liubov Dmitrieva.
3964 * New interfaces: scandirat, scandirat64
3965 Implemented by Ulrich Drepper.
3967 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3968 Implemented by Ulrich Drepper.
3970 * nscd now also caches the netgroup database.
3971 Implemented by Ulrich Drepper.
3973 * Integrate libm with gcc's -ffinite-math-only option.
3974 Implemented by Ulrich Drepper.
3976 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3977 to math functions. Implemented by Ulrich Drepper.
3979 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3980 Implemented by Ulrich Drepper.
3982 * New Linux interfaces: process_vm_readv, process_vm_writev
3984 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3985 Implemented by Ulrich Drepper.
3987 * Optimized nearbyint and strcasecmp for PPC.
3988 Implemented by Adhemerval Zanella.
3990 * New locales: bho_IN, unm_US, es_CU, ta_LK
3994 * The following bugs are resolved with this release:
3996 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
3997 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
3998 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
3999 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
4000 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
4001 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
4002 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
4003 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
4004 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
4005 12795, 12811, 12813, 12814, 12841
4007 * The RPC implementation in libc is obsoleted. Old programs keep working
4008 but new programs cannot be linked with the routines in libc anymore.
4009 Programs in need of RPC functionality must be linked against TI-RPC.
4010 The TI-RPC implementation is IPv6 enabled and there are other benefits.
4012 Visible changes of this change include (obviously) the inability to link
4013 programs using RPC functions without referencing the TI-RPC library and the
4014 removal of the RPC headers from the glibc headers.
4015 Implemented by Ulrich Drepper.
4017 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
4018 syncfs, setns, sendmmsg
4020 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4021 yue_HK, lij_IT, mhr_RU
4023 * New encodings: CP770, CP771, CP772, CP773, CP774
4025 * New program sotruss to trace calls through PLTs
4026 Implemented by Ulrich Drepper.
4028 * The malloc hook implementation is marked deprecated and will be removed
4029 from the default implementation in the next version. The design never
4030 worked ever since the introduction of threads. Even programs which do
4031 not create threads themselves can use multiple threads created internally.
4035 * The following bugs are resolved with this release:
4037 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4038 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4039 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4040 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4043 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4045 * POWER7 optimizations: memset, memcmp, strncmp
4047 * New optimized string functions for x86-64: strnlen (SSE2),
4048 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4049 Implemented by Ulrich Drepper.
4053 * The following bugs are resolved with this release:
4055 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4056 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4057 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4058 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4059 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4060 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4061 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4062 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4064 * New interfaces: pthread_getname_np, pthread_setname_np
4066 * New Linux interface: recvmmsg
4068 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4070 * The dynamic linker now recognizes supported ABI versions from the
4071 EI_ABIVERSION field in the ELF header.
4072 Implemented by Ulrich Drepper.
4074 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4075 will not be used to fill in password fields in the passwd.byname replies.
4076 Instead it is used to synthesize the shadow.byname table, should it be
4077 missing. This is a useful mode in some installations involving Solaris.
4078 Implemented by Ulrich Drepper.
4080 * New locales: kok_IN, sq_MK, cv_RU
4084 * The following bugs are resolved with this release:
4086 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4087 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4088 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4089 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4090 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4091 10789, 10817, 10823, 10840, 10847
4093 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4095 Implemented by Ulrich Drepper.
4097 * Checking version of longjmp added that fails if an uninitialized stack
4098 frame would be created. Implemented by Ulrich Drepper.
4100 * STT_GNU_IFUNC is now supported in static executables.
4101 Implemented by H.J. Lu.
4103 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4105 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4106 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4107 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4108 Contributed by H.J. Lu.
4110 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4111 Implemented by Ulrich Drepper.
4113 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4115 Contributed by H.J. Lu.
4117 * Support for fma instruction in AVX on x86-64.
4118 Implemented by H.J. Lu and Ulrich Drepper.
4120 * AVX support in x86-64 auditing support in ld.so.
4121 Implemented by H.J. Lu.
4123 * STB_GNU_UNIQUE support added.
4124 Implemented by Ulrich Drepper.
4126 * Implement second fallback mode for optimized DNS lookup for even more
4127 broken environments. If two requests from the same port are not
4128 handled correctly close the socket and open a new one before sending
4129 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4130 can be used to select this mode right away, instead of rediscovering the
4131 necessity is every process again.
4132 Implemented by Ulrich Drepper.
4134 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4135 Implemented by Adam Tkac.
4137 * Optimized iconv conversions for S390x.
4138 Implemented by Andreas Krebbel.
4140 * Using condvars with PI mutexes is now more efficient due to kernel
4141 support for requeueing to PI futexes. NPTL support added for x86-64.
4142 Implemented by Ulrich Drepper.
4144 * New locales: ps_AF, my_MM
4148 * The following bugs are resolved with this release:
4150 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
4151 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
4152 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
4153 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
4154 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
4156 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
4157 Implemented by Ulrich Drepper.
4159 * New Linux interfaces: accept4, fallocate, fallocate64.
4160 Implemented by Ulrich Drepper.
4162 * Correct declarations of string function when used in C++ code. This
4163 could lead to compile errors for invalid C++ code.
4165 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
4168 * New POSIX 2008 interface: psiginfo
4169 Implemented by Ulrich Drepper.
4171 * New ISO C++1x interfaces: quick_exit, at_quick_exit
4172 Implemented by Ulrich Drepper.
4174 * Support for selecting between multiple function definitions at runtime
4175 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
4177 * The libcrypt library can now use the hash function implementations in
4178 NSS. Implemented by Ulrich Drepper.
4180 * The malloc implementation can be compiled to be less memory efficient
4181 but higher performing in multi-threaded programs.
4182 Implemented by Ulrich Drepper.
4184 * New locales: nan_TW@latin, ks_IN
4186 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
4187 Implemented by Ulrich Drepper.
4189 * Extended printf hook support. It is possible to use user-defined types
4190 and extend existing format specifiers.
4191 Implemented by Ulrich Drepper.
4193 * Handling for group shadow files has been added.
4194 Implemented by Ulrich Drepper.
4196 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
4197 servers (the case, e.g., for some people using the built-in DNS
4198 server in ADSL modems/routers). There is a once-per-process timeout
4199 in case of a broken server. To avoid it, users can run nscd or put
4200 'options single-request' in /etc/resolv.conf.
4201 Implemented by Ulrich Drepper.
4205 * The following bugs are resolved with this release:
4207 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
4208 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
4209 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
4210 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
4211 6968, 6974, 6980, 6995, 7008, 7009, 7029
4213 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
4214 up at the same time. Implemented by Ulrich Drepper.
4216 * TLS descriptors for LD and GD on x86 and x86-64.
4217 Implemented by Alexandre Oliva.
4219 * getaddrinfo now handles DCCP and UDPlite.
4220 Implemented by Ulrich Drepper.
4222 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
4223 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4224 Implemented by Ulrich Drepper.
4226 * New implementation of memmem, strstr, and strcasestr which is O(n).
4227 Implemented by Eric Blake.
4229 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4231 * Implement "e" option for popen to open file descriptor with the
4232 close-on-exec flag set. Implemented by Ulrich Drepper.
4234 * Implement "b" mode for fmemopen. In this mode writes writes don't
4235 implicitly add a NUL byte and seeks from the end of the buffer really
4236 use the buffer end, not the string length as the basis.
4237 Implemented by Ulrich Drepper.
4239 * Many functions, exported and internal, now atomically set the close-on-exec
4240 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4242 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4244 Implemented by Pravin Satpute.
4246 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4250 * The following bugs are resolved with this release:
4252 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4253 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4254 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4255 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4256 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4257 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4258 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4260 * New locales: bo_CN, bo_IN, shs_CA.
4262 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4264 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4265 Implemented by Pravin Satpute.
4267 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4269 * nscd caches now all timeouts for DNS entries
4270 Implemented by Ulrich Drepper.
4272 * nscd is more efficient and wakes up less often.
4273 Implemented by Ulrich Drepper.
4275 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4276 vdprintf, and obstack_vprintf.
4277 Implemented by Jakub Jelinek.
4279 * Faster memset for x86-64.
4280 Implemented by Harsha Jagasia and H.J. Lu.
4282 * Faster memcpy on x86.
4283 Implemented by Ulrich Drepper.
4285 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4286 Implemented by Ulrich Drepper.
4288 * Faster sqrt and sqrtf implemention for some PPC variants.
4289 Implemented by Steven Munroe.
4293 * The following bugs are resolved with this release:
4295 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4296 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4297 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4298 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4299 5071, 5103, 5104, 5112, 5113, 5184, 5186
4301 * More checking functions: fread, fread_unlocked, open*, mq_open.
4302 Implemented by Jakub Jelinek and Ulrich Drepper.
4304 * Extend fortification to C++. Implemented by Jakub Jelinek.
4306 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4307 by not recognizing 'a' as a modifier when those specs are requested.
4308 Implemented by Jakub Jelinek.
4310 * PPC optimizations to math and string functions.
4311 Implemented by Steven Munroe.
4313 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4314 options to be passed. Implemented by Ulrich Drepper.
4316 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4318 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4319 Implemented by Ulrich Drepper.
4321 * Handle private futexes in the NPTL implementation.
4322 Implemented by Jakub Jelinek and Ulrich Drepper.
4324 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4325 Implemented by Roland McGrath and Ulrich Drepper.
4327 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4329 * SHA-256 and SHA-512 based password encryption.
4330 Implemented by Ulrich Drepper.
4332 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4333 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4336 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4337 Implemented by Ulrich Drepper.
4341 * The following bugs are resolved with this release:
4343 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4344 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4345 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4346 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4347 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4348 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4349 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4352 * New Linux interfaces: epoll_pwait, sched_getcpu.
4354 * New generic interfaces: strerror_l.
4356 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4360 * The following bugs are resolved with this release:
4362 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4363 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4364 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4365 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4366 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4367 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4368 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4369 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4370 3225, 3251, 3252, 3253, 3273
4372 * For Linux, the sorting of addresses returned by getaddrinfo now also
4373 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4374 Implemented by Ulrich Drepper.
4376 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4377 Implemented by Ulrich Drepper.
4379 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4381 * New iconv module for MIK. Contributed by Alexander Shopov.
4383 * For sites with broken group and/or passwd database, the auto-propagate
4384 option of nscd can prevent creating ID lookup entries from the results
4385 of a name lookup and vice versa. This usually is no problem but some
4386 site might have problems with the default behavior.
4387 Implemented by Ulrich Drepper.
4389 * Iterating over entire database in NIS can be slow. With the
4390 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4391 to trade time for memory. The entire database will be read at once.
4392 Implemented by Ulrich Drepper.
4394 * The interfaces introduced in RFC 3542 have been implemented by
4397 * Support for the new ELF hash table format was added by Ulrich Drepper.
4399 * Support for priority inheritance mutexes added by Jakub Jelinek and
4402 * Support for priority protected mutexes added by Jakub Jelinek.
4404 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4405 or_IN, csb_PL, fy_NL, sr_ME.
4409 * More overflow detection functions.
4411 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4412 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4414 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4415 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4416 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4417 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4418 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4419 by Masahide Washizawa.
4421 * It is now possible to install audit libraries for the dynamic linker using
4422 LD_AUDIT. Implemented by Ulrich Drepper.
4424 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4425 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4426 For a libc and libpthread that works well on Linux 2.4 kernels, we
4427 recommend using the stable 2.3 branch.
4429 * The new function open_wmemstream acts like open_memstream,
4430 but uses a wchar_t wide character buffer.
4432 * The new function ppoll is an improved version of poll, similar to pselect.
4434 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4435 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4436 renameat, unlinkat, linkat, symlinkat, readlinkat.
4438 * New Linux kernel system calls: unshare,
4439 inotify_init, inotify_add_watch, inotify_rm_watch.
4441 * The euidaccess function is now also known by the alias eaccess,
4442 for compatibility with some other systems.
4444 * Timezone data updated to 2006b version.
4448 * The following bugs are resolved with this release:
4450 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4451 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4452 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4453 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4454 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4455 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4457 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4459 * As of this release, GCC 4 can be used to compile the C Library.
4461 * Timezone data updated to 2005m version.
4465 * The following bugs are resolved with this release:
4467 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4468 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4469 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4470 777, 787, 821, 822, 823, 825
4472 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4476 * Support for RFC 3678. Real implementations exist only for Linux so far.
4477 Implemented by Ulrich Drepper.
4479 * nscd can now cache entries persistently. Expiring entries are reloaded.
4480 For speedups the cache can be shared in memory with client processes.
4481 Implemented by Ulrich Drepper.
4483 * nscd can now perform SELinux checks.
4484 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4486 * getaddrinfo queries are now cached. Canonical name lookup is performed
4488 Implemented by Ulrich Drepper.
4490 * The nothrow function attribute is used when headers are used by gcc when
4491 compiling C code. This can avoid significant amounts of exception
4494 * The malloc functions perform more error checking and are stricter when
4495 it comes to reacting on errors. The default action is to terminate
4496 the process after showing an error message. Implemented by Ulrich Drepper.
4498 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4499 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4501 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4502 namespaces using the new function dlmopen(). This feature is of course,
4503 like most other dynamic loading functionality, not available in statically
4504 linked applications. Implemented by Ulrich Drepper.
4506 * Low-overhead boundary checking variants of string and some stdio functions
4507 were added. These are to be used in conjunction with a gcc patch by
4508 Jakub Jelinek which adds calls to these functions if possible.
4509 Implemented by Jakub Jelinek and Ulrich Drepper.
4511 * Old code for several operating systems and machine architectures that
4512 have not been in working condition in a long time have been removed from
4513 the main source tree maintained by the GNU C Library's maintainers.
4514 These files are now reside in the separate `ports' source module
4515 that is usable as an add-on when building the library.
4519 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4520 interrogate the dynamic linker, compatible with the Solaris interface.
4522 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4523 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4525 * getifaddrs now uses the netlink interface on Linux to get its information.
4526 Implemented by Thorsten Kukuk.
4528 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4529 Implemented by Ulrich Drepper.
4531 * support for non-executable stacks on x86 has been added. Changes mostly
4534 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4537 * getaddrinfo now performs destination address selection according to
4542 * Thread-safe interfaces for many functions that access locale data
4543 were added in version 2.3, but these features were omitted from NEWS.
4544 Many functions have variants with an `_l' suffix that take a `locale_t'
4545 object as a parameter rather than consulting the current locale.
4546 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4547 create and maintain `locale_t' objects. Additionally, the new function
4548 `uselocale' sets "the current locale" (as used by functions not so
4549 parameterized) set for an individual thread. These features were added
4550 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4552 * The functions getresuid, getresgid, setresuid, and setresgid, which
4553 have long been available on Linux, are now declared in <unistd.h>
4554 and are now also available on the Hurd.
4556 * ELF thread-local storage support (TLS) now works on x86-64.
4558 * The new dynamic string token $LIB is expanded in shared library names.
4559 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4561 * Aldy Hernandez contributed complete software floating point support for
4562 PowerPC machines with no FPU.
4564 * fexecve is implemented on Linux.
4566 * The `btowc' function should work at least twice as fast due to
4567 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4569 * With approriate thread add-ons cancelable functions are now implemented
4570 in libc.so as well. No need to call the function in libpthread. This
4571 change allowed to finally disable the incorrect and expensive handling
4572 of weak definition in ld.so.
4574 * Yet more PLT entries in libc.so have been removed. We finally arrived
4575 at the bare minimum. Startup times improved appropriately.
4577 * Support for the new Linux/x86 system call interface was added. The
4578 AT_SYSINFO auxiliary vector entry is recognized and handled.
4582 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4585 * iconv (the program and the interface) now accepts empty names (excluding
4586 options like //TRANSLIT) to mean "use charset of current locale".
4588 * localedef can now transliterate characters in strings which are not in
4589 the provided charmap. The information from the input locale is used.
4591 * Prelinking support was added for ELF targets. This requires additional
4592 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4594 * Read-only stdio streams now use mmap to speed up operation by eliminating
4595 copying and buffer underflows. To use add 'm' to the mode string of
4596 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4598 * The malloc functions were completely rewritten by Wolfram Gloger based
4599 on Doug Lea's malloc-2.7.0.c.
4601 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4602 implementation of regex.
4604 * Bruno Haible upgraded the iconv and locale implementation to support
4607 * Contents of the LC_* and LANG environment variables in the CEN style are
4608 not recognized anymore. It never was used. Change by Ulrich Drepper.
4610 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4611 thread-local storage (TLS) ABI on some platforms.
4612 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4614 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4615 EUC-JISX0213, and TSCII.
4617 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4618 BSD-compatible interface for getting all network interface addresses.
4619 Implementation for IPv4 by Roland McGrath.
4621 * Loading of locale data is faster due to the introduction of a locale
4622 archive. Implemented by Roland McGrath and Ulrich Drepper.
4624 * Startup times are significantly reduced by not using exported functions
4625 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4628 * Steven Munroe contributed a port to PowerPC64/Linux.
4632 * The Hurd now uses the GNU libio implementation of stdio rather than the
4633 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4635 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4636 with the same behavior as the Linux system call of the same name.
4640 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4641 128-bit long double format.
4643 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4644 IBM1161, and IBM1162 charsets.
4646 * Andreas Jaeger contributed a port to x86-64/Linux.
4648 * Peter Bruin contributed a port to PowerPC/Hurd.
4650 * libc functions using I/O streams now can handle wide-oriented streams
4653 * optimizations in the dynamic linker. Binaries created by recent binutils
4654 versions start up quicker due to reduced time spent on relocations.
4656 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4660 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4661 asinh, atanh, j0 for the 128-bit long double format.
4663 * Bruno Haible updated all the code handling Unicode in some form to
4664 support Unicode 3.1.
4666 * Speed of regex for single-byte locales is back to previous levels.
4667 Patch by Isamu Hasegawa.
4669 * Alpha, SPARC, and IA-64 now also using floating stacks.
4671 * Startup time of internationalized applications greatly improved through
4672 iconv cache. Use iconvconfig to generate the cache file.
4673 Contributed by Ulrich Drepper.
4675 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4676 severe performance problems. Patch by David Mosberger.
4678 * The Hurd port got a lot more functionality like AIO, various stdio
4679 extensions, etc. Mainly done by Roland McGrath.
4681 * mtrace can now lookup symbols in shared libraries.
4685 * Intel's IA-64 math library is largely integrated. It provides fast and
4686 accurate implementatations for most basic and standard math functions
4687 in float, double, and long double format.
4689 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4690 and asin for the 96-bit long double format and asin, log, tan for the
4691 128-bit long double format.
4693 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4694 The basic double functions exist today. Contributed by Abraham Ziv
4695 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4696 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4698 * An asynchronous name lookup library was added. The interface is designed
4699 after POSIX AIO. The proposal was circulated beforehand to get comments.
4700 No negative ones came in. Implemented by Ulrich Drepper.
4702 * Port to S390/64bit contributed by Martin Schwidefsky
4703 <schwidefsky@de.ibm.com>.
4705 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4706 of functions for Linux/IA-64.
4708 * The RPC code is now thread safe. Threads can now use the same service
4709 of different services at the same time. Patch by Eric Norum
4710 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4712 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4713 family of functions for Linux/S390.
4715 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4716 of functions for Linux/x86.
4718 * Port to Linux/CRIS contributed by Axis Communications.
4722 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4723 we can now check for namespace violations and missing declarations. The
4724 result is that almost all headers are now Unix-compliant (as defined in
4725 the upcoming XPG6). The negative side is that some programs might need
4726 corrections, too, if they depend on the incorrect form of the headers in
4727 previous versions which defined too many symbols and included too many
4730 * regex now handles multibyte character sets correctly.
4731 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4733 * iconv (the program) does now conform to the upcoming XPG6 and handles
4734 charmaps. Instead of the charset names the path of charmaps can be
4735 provided and the conversion happens based on this data.
4736 Contributed by Ulrich Drepper.
4738 * The locale program now provides detailed information about the installed
4743 only lists the names of the supported locales
4747 provides details such as country, language, and codeset name.
4748 Contributed by Ulrich Drepper.
4752 * The gencat program now parses the input file according to the charset
4753 selected by the LC_CTYPE category. This is important for stateful
4754 character sets. To make generating catalogs easier there is a way
4755 to overwrite the charset selected by the locale: before the first
4756 message or $ quote line the catalog can contain a line like
4758 $ codeset=ISO-8859-2
4760 to select the charset (ISO-8859-2 in this case).
4762 Implemented by Shinya Hanataka and Ulrich Drepper.
4764 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4765 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4766 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4768 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4769 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4771 * The LANGUAGE environment variable is now ignored unless the locale is
4772 changed from the default "C" locale.
4774 * The usual bug fixes.
4778 * Greg McGary added runtime support for bounds checking using gcc's
4779 new -fbounded-pointers option. ix86 target is complete. PowerPC
4782 * Thorsten Kukuk added secure mode support to nscd.
4784 * The Berkeley db libraries have been removed.
4786 Related, the nss_db module is now in a separate package since it
4787 obviously requires a database library being available.
4789 * Wide character I/O streams implemented by Ulrich Drepper.
4791 * Functions from the extended socket API added by Ulrich Drepper.
4793 * Functions feenableexcept and fedisableexcept to control the
4794 behaviour of individual exceptions have been added by Andreas Jaeger.
4796 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4798 * The resolver code has been updated from bind 8.2.3-T5B which supports
4799 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4802 This change could in some situations effect backward compatibility. Since
4803 now `_res' is a thread-local instead of a global variable, modifying it
4804 in one thread does not have any effect in other threads.
4806 The resolver library was also extended to allow IPv6 as the transport
4807 protocol for the requests. This work was done by Stig Venaas.
4809 * Compatibility code for K&R C compilers has been removed from the
4810 header files. A ISO C compiler is needed to use the library
4811 (conforming to either C89 or C99 standard).
4813 * Complete rewrite of the localedef program to support multibyte character
4814 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4815 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4816 Implemented by Ulrich Drepper.
4818 Bruno Haible significantly improved the generation and use of the data
4819 structures for the wide character tables.
4821 * Plural handling in gettext implemented by Ulrich Drepper.
4823 * The utmp daemon has been removed.
4825 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4827 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4830 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4832 * POSIX barriers implemented by Kaz Kylheku.
4834 * POSIX spawn function family implemented by Ulrich Drepper.
4836 * POSIX spinlocks are now available.
4838 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4840 * the configure option --enable-kernel=X.Y.Z allows to strip out
4841 compatibility for kernel versions before X.Y.Z. This is currently only
4842 implemented for Linux.
4844 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4845 field sin6_scope_id. This means that all programs using IPv6 should be
4846 recompiled. Don't expect binary compatibility with previous glibc
4849 * various conversion modules for IBM character sets contributed by
4852 * IA-64 port by Jes Sorensen and HJ Lu.
4866 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4868 * New xdr functions are added; some rpc functions are now 64bit clean.
4870 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4872 * Fixed known incompatibilities with glibc 2.0.
4874 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4876 * Optimized a number of functions (especially the ELF dynamic loader).
4878 * Update timezone data files.
4880 * lots of charmaps corrections
4882 * some new locale definitions and charmaps
4887 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4888 conform to POSIX member type requirements. Symbol versions have been
4889 adjusted as needed within the library, and for direct use by applications,
4890 but there is potential for problems if third-party libraries use
4891 struct timeval as part of their interface. This does not present
4892 a problem for X and other "essential" system libraries.
4894 * An additional locale model to support C++ Standard Library locale
4895 model and probably more was implemented by Ulrich Drepper.
4897 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4900 * Miles Bader provided the `argp' function family to support hierachical
4901 command line argument parsing, layered on top of getopt.
4903 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4905 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4908 * scanf recognizes the %a and %A format for scanning floating point numbers.
4910 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4911 information and interfaces for the available integer types.
4913 * about 130 new math functions were added to implement the ISO C9x math
4916 * the new header <complex.h> contains definitions of the complex math
4917 functions from ISO C 9X.
4919 * the new header <tgmath.h> defines generic macros to use complex or
4920 real valued functions.
4922 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4924 * Andreas Jaeger provided a test suite for the math library.
4926 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4928 * Ulrich Drepper added character set conversion functions (iconv).
4930 * Optimized string functions have been added.
4932 * The localedata addon is now part of glibc.
4934 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4936 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4937 daemon for NSS (nscd).
4939 Missing a better place here are some numbers on improvements. Under
4940 Linux 2.1.125 un-tar-ing the kernel sources takes
4944 using local files 12.19s 6.88s 22.91s
4946 using NIS 13.92s 8.91s 26.34s
4948 using NIS & nscd 10.37s 7.34s 25.30s
4950 using NIS+ 27.57s 30.37s 640.46s
4952 using NIS+ & nscd 10.25s 7.83s 26.51s
4954 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4956 Keep in mind that non-namelookup related operations dominate above times.
4957 It was just a common complain that using NIS+ unpacking the kernel is
4960 [1] The old nscd implementation is not available anymore since it was
4961 distributed with glibc up to version 2.0.98 and thus is now replaced.
4963 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4965 * Mark Kettenis provided a Hesiod NSS module.
4967 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4968 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4970 * rcmd can now handle netgroups (Dick Streefland).
4972 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4975 * Support for the IPv6 protocol has been added to the socket API, as per the
4976 latest draft standards.
4978 * Support for Linux 2.2 has been added.
4980 * Interface changes relative to the latest 2.0.x release:
4981 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4982 addseverity NEW: Unix98
4983 alphasort64 NEW: LFS
4984 argp_err_exit_status NEW: argp, GNU ext
4985 argp_error NEW: argp, GNU ext
4986 argp_failure NEW: argp, GNU ext
4987 argp_help NEW: argp, GNU ext
4988 argp_parse NEW: argp, GNU ext
4989 argp_program_bug_address NEW: argp, GNU ext
4990 argp_program_version NEW: argp, GNU ext
4991 argp_program_version_hook NEW: argp, GNU ext
4992 argp_state_help NEW: argp, GNU ext
4993 argp_usage NEW: argp, GNU ext
4994 authdes_create NEW: Secure RPC
4995 authdes_getucred NEW: Secure RPC
4996 authdes_pk_create NEW: Secure RPC
4997 backtrace NEW: GNU ext.
4998 backtrace_symbols NEW: GNU ext.
4999 backtrace_symbols_fd NEW: GNU ext.
5001 cacosf NEW: ISO C 9x
5002 cacosh NEW: ISO C 9x
5003 cacoshf NEW: ISO C 9x
5004 cacoshl NEW: ISO C 9x
5005 cacosl NEW: ISO C 9x
5012 casinf NEW: ISO C 9x
5013 casinh NEW: ISO C 9x
5014 casinhf NEW: ISO C 9x
5015 casinhl NEW: ISO C 9x
5016 casinl NEW: ISO C 9x
5018 catanf NEW: ISO C 9x
5019 catanh NEW: ISO C 9x
5020 catanhf NEW: ISO C 9x
5021 catanhl NEW: ISO C 9x
5022 catanl NEW: ISO C 9x
5023 cbc_crypt NEW: Secure RPC
5027 ccoshf NEW: ISO C 9x
5028 ccoshl NEW: ISO C 9x
5034 cimagf NEW: ISO C 9x
5035 cimagl NEW: ISO C 9x
5036 clearerr_locked REMOVED
5037 clntunix_create NEW: sunrpc ext
5039 clog10 NEW: ISO C 9x
5040 clog10f NEW: ISO C 9x
5041 clog10l NEW: ISO C 9x
5051 cprojf NEW: ISO C 9x
5052 cprojl NEW: ISO C 9x
5054 crealf NEW: ISO C 9x
5055 creall NEW: ISO C 9x
5060 csinhf NEW: ISO C 9x
5061 csinhl NEW: ISO C 9x
5064 csqrtf NEW: ISO C 9x
5065 csqrtl NEW: ISO C 9x
5069 ctanhf NEW: ISO C 9x
5070 ctanhl NEW: ISO C 9x
5072 des_setparity NEW: Secure RPC
5073 ecb_crypt NEW: Secure RPC
5074 endutxent NEW: Unix98
5076 exp10f NEW: ISO C 9x
5077 exp10l NEW: ISO C 9x
5081 fattach NEW: STREAMS
5082 fdetach NEW: STREAMS
5086 feclearexcept NEW: ISO C 9x
5087 fegetenv NEW: ISO C 9x
5088 fegetexceptflag NEW: ISO C 9x
5089 fegetround NEW: ISO C 9x
5090 feholdexcept NEW: ISO C 9x
5092 feraiseexcept NEW: ISO C 9x
5093 ferror_locked REMOVED
5094 fesetenv NEW: ISO C 9x
5095 fesetexceptflag NEW: ISO C 9x
5096 fesetround NEW: ISO C 9x
5097 fetestexcept NEW: ISO C 9x
5098 feupdateenv NEW: ISO C 9x
5099 fflush_locked REMOVED
5103 fgets_unlocked NEW: GNU ext.
5104 fileno_locked REMOVED
5116 fputc_locked REMOVED
5117 fputs_unlocked NEW: GNU ext.
5118 fread_unlocked NEW: GNU ext.
5123 fstatvfs NEW: Unix98
5127 ftruncate64 NEW: LFS
5129 fwrite_unlocked NEW: GNU ext.
5130 gai_strerror NEW: IPv6
5134 getchar_locked REMOVED
5136 getdate_err NEW: Unix98
5137 getdate_r NEW: GNU ext.
5139 getnameinfo NEW: IPv6
5140 getnetname NEW: Secure RPC
5141 getpmsg NEW: STREAMS
5142 getpt NEW: Unix98 PTY
5143 getrlimit64 NEW: LFS
5144 getutxent NEW: Unix98
5145 getutxid NEW: Unix98
5146 getutxline NEW: Unix98
5147 glob64 NEW: GNU ext.
5148 globfree64 NEW: GNU ext.
5149 gnu_get_libc_release NEW: GNU ext.
5150 gnu_get_libc_version NEW: GNU ext.
5151 grantpt NEW: Unix98 PTY
5152 host2netname NEW: Secure RPC
5154 iconv_close NEW: iconv
5155 iconv_open NEW: iconv
5156 if_freenameindex NEW: IPv6
5157 if_indextoname NEW: IPv6
5158 if_nameindex NEW: IPv6
5159 if_nametoindex NEW: IPv6
5160 in6addr_any NEW: IPv6
5161 in6addr_loopback NEW: IPv6
5162 inet6_isipv4mapped NEW: IPv6
5163 isastream NEW: STREAMS
5164 iswblank NEW: GNU ext.
5165 key_decryptsession NEW: Secure RPC
5166 key_decryptsession_pk NEW: Secure RPC
5167 key_encryptsession NEW: Secure RPC
5168 key_encryptsession_pk NEW: Secure RPC
5169 key_gendes NEW: Secure RPC
5170 key_get_conv NEW: Secure RPC
5171 key_secretkey_is_set NEW: Secure RPC
5172 key_setnet NEW: Secure RPC
5173 key_setsecret NEW: Secure RPC
5174 llrint NEW: ISO C 9x
5175 llrintf NEW: ISO C 9x
5176 llrintl NEW: ISO C 9x
5177 llround NEW: ISO C 9x
5178 llroundf NEW: ISO C 9x
5179 llroundl NEW: ISO C 9x
5184 lrintf NEW: ISO C 9x
5185 lrintl NEW: ISO C 9x
5186 lround NEW: ISO C 9x
5187 lroundf NEW: ISO C 9x
5188 lroundl NEW: ISO C 9x
5190 makecontext NEW: Unix98
5191 mempcpy NEW: GNU ext.
5194 modify_ldt NEW: kernel
5198 nearbyint NEW: ISO C 9x
5199 nearbyintf NEW: ISO C 9x
5200 nearbyintl NEW: ISO C 9x
5201 netname2host NEW: Secure RPC
5202 netname2user NEW: Secure RPC
5203 nexttoward NEW: ISO C 9x
5204 nexttowardf NEW: ISO C 9x
5205 nexttowardl NEW: ISO C 9x
5209 passwd2des NEW: Secure RPC
5211 pow10f NEW: GNU ext.
5212 pow10l NEW: GNU ext.
5215 printf_size NEW: GNU ext.
5216 printf_size_info NEW: GNU ext.
5217 profil_counter REMOVED
5218 pthread_mutexattr_getkind_np REPLACED
5219 pthread_mutexattr_setkind_np REPLACED
5220 ptsname NEW: Unix98 PTY
5221 ptsname_r NEW: Unix98 PTY
5223 putchar_locked REMOVED
5224 putgrent NEW: GNU ext.
5226 putpmsg NEW: STREAMS
5227 pututxline NEW: Unix98
5231 readdir64_r NEW: LFS
5232 remquo NEW: ISO C 9x
5233 remquof NEW: ISO C 9x
5234 remquol NEW: ISO C 9x
5236 roundf NEW: ISO C 9x
5237 roundl NEW: ISO C 9x
5239 scalbln NEW: ISO C 9x
5240 scalblnf NEW: ISO C 9x
5241 scalblnl NEW: ISO C 9x
5243 sendfile NEW: kernel
5244 setcontext NEW: Unix98
5245 setrlimit64 NEW: LFS
5246 setutxent NEW: Unix98
5248 sigignore NEW: Unix98
5249 sigqueue NEW: POSIX.1b
5250 sigrelse NEW: Unix98
5251 sigset NEW: POSIX.1b
5252 sigtimedwait NEW: POSIX.1b
5253 sigwaitinfo NEW: POSIX.1b
5254 sincos NEW: GNU ext.
5255 sincosf NEW: GNU ext.
5256 sincosl NEW: GNU ext.
5260 strcasestr NEW: GNU ext.
5261 strtoimax NEW: ISO C 9x
5262 strtoumax NEW: ISO C 9x
5263 strverscmp NEW: GNU ext.
5264 svcauthdes_stats NEW: Secure RPC
5265 svcunix_create NEW: sunrpc etx
5266 svcunixfd_create NEW: sunrpc ext
5267 swapcontext NEW: Unix98
5268 tcgetsid NEW: Unix98 PTY
5269 tdestroy NEW: GNU ext.
5270 tgamma NEW: ISO C 9x
5271 tgammaf NEW: ISO C 9x
5272 tgammal NEW: ISO C 9x
5276 truncf NEW: ISO C 9x
5277 truncl NEW: ISO C 9x
5279 unlockpt NEW: Unix98 PTY
5280 updwtmpx NEW: Unix98
5281 user2netname NEW: Secure RPC
5282 utmpxname NEW: Unix98
5283 versionsort NEW: GNU ext.
5284 versionsort64 NEW: GNU ext.
5286 wcscasecmp NEW: GNU ext.
5287 wcsncasecmp NEW: GNU ext.
5288 wcsnlen NEW: GNU ext.
5289 wcstoimax NEW: ISO C 9x
5290 wcstoll NEW: ISO C 9x
5291 wcstoull NEW: ISO C 9x
5292 wcstoumax NEW: ISO C 9x
5294 wordexp NEW: POSIX.2
5295 wordfree NEW: POSIX.2
5296 write_profiling REMOVED
5297 xdecrypt NEW: Secure RPC
5298 xdr_authdes_cred NEW: Secure RPC
5299 xdr_authdes_verf NEW: Secure RPC
5300 xdr_cryptkeyarg NEW: Secure RPC
5301 xdr_cryptkeyarg2 NEW: Secure RPC
5302 xdr_cryptkeyres NEW: Secure RPC
5303 xdr_getcredres NEW: Secure RPC
5304 xdr_key_netstarg NEW: Secure RPC
5305 xdr_key_netstres NEW: Secure RPC
5306 xdr_keybuf NEW: Secure RPC
5307 xdr_keystatus NEW: Secure RPC
5308 xdr_netnamestr NEW: Secure RPC
5309 xdr_sizeof NEW: Secure RPC
5310 xdr_unixcred NEW: sunrpc ext
5311 xencrypt NEW: Secure RPC
5312 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5323 * inet_ntoa is thread-safe
5325 * updwtmp is moved from libutil to libc
5327 * rewrite of cbrt function
5329 * update of timezone data
5343 * add atoll function
5345 * fix complex problems in Berkeley DB code
5347 * fix math functions
5351 * fixed lots of header problems (especially Linux/GNU specific)
5353 * dynamic loader preserves all registers
5355 * Roland McGrath provided support for handling of auxiliary objects in
5356 the ELF dynamic loader.
5358 * support for parallel builds is improved
5362 * GNU extensions are no longer declared by default. To enable them you
5363 must define the macro `_GNU_SOURCE' in your program or compile with
5366 * The library has changed from using GNU ld symbol aliases to using weak
5367 symbols where available. The ELF object file format supports weak
5368 symbols; GNU ld also supports weak symbols in the a.out format. (There
5369 is also now support for other GNU ld extensions in ELF. Use the
5370 `--with-elf' option to configure to indicate you have ELF, and
5371 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5372 of many files which contained only symbol aliases, reducing the size of
5373 the source and the compiled library; many other files were renamed to
5374 less cryptic names previously occupied by the symbol alias files.
5375 There is a new header file <elf.h> for programs which operate on
5376 files in the ELF format.
5378 * Converted to Autoconf version 2, so `configure' has more options.
5379 Run `configure --help' to see the details.
5381 * The library can now be configured to build profiling, highly-optimized
5382 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5383 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5384 `configure' enable building these extra libraries. The shared library is
5385 built by default when using both ELF and GNU ld. When shared libraries
5386 are enabled, the new library `-ldl' is available for arbitrary run-time
5387 loading of shared objects; its interface is defined in <dlfcn.h>. The
5388 new header file <link.h> gives access to the internals of the run-time
5389 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5390 application of same name on other systems and it provides information
5391 about dynamically linked binaries.
5393 * The C library now provides the run-time support code for profiling
5394 executables compiled with `-pg'. Programs can control the profiling code
5395 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5396 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5397 the support for this file format was contributed by David Mosberger-Tang.
5399 * The math code has been replaced with a math library based on fdlibm from
5400 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5401 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5402 functions. The math functions now reside in a separate library, so
5403 programs using them will need to use `-lm' their linking commands.
5405 * John C. Bowman contributed optimized ix87 assembler inline functions.
5407 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5408 mechanism similar to that found in Solaris 2. This is now used for the
5409 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5410 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5411 file controls what services are used for each individual database. This
5412 works by loading shared libraries with names specified in `nsswitch.conf',
5413 so service modules can be changed or added at any time without even
5414 relinking any program. Currently there are the file, db, and NIS based
5415 NSS services available.
5417 * The new functions `strtoq' and `strtouq' parse integer values from
5418 strings, like `strtol' and `strtoul', but they return `long long int' and
5419 `unsigned long long int' values, respectively (64-bit quantities).
5421 * The new functions `strtof' and `strtold' parse floating-point values from
5422 strings, like `strtod', but they return `float' and `long double' values,
5423 respectively (on some machines `double' and `long double' are the same).
5425 * Ulrich Drepper has contributed new implementations of the floating-point
5426 printing and reading code used in the `printf' family of functions and
5427 `strtod', `strtof', and `strtold'. These new functions are perfectly
5428 accurate, and much faster than the old ones.
5430 * The implementation of the POSIX locale model was completely rewritten by
5431 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5432 to compile the POSIX locale definition.
5434 * The former dummy implementations of the strcoll and strxfrm function are
5435 now replaced by fully functional code contributed by Ulrich Drepper. The
5436 collation information comes from the POSIX locale definitions.
5438 * The new header <langinfo.h> defines an interface for accessing
5439 various locale-dependent data (using the locale chosen with `setlocale').
5441 * Ulrich Drepper has contributed a new suite of functions for operation on
5442 wide-character and multibyte-character strings, in <wchar.h>;
5443 and classification and case conversion of wide characters, in <wctype.h>.
5444 These new functions are conforming to the ISO C, Amendement 1 specification.
5446 * There is now a second implementation of the standard I/O library available.
5447 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5448 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5450 * You can now use positional parameter specifications in format strings
5451 for the `printf' and `scanf' families of functions. For example,
5452 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5453 ``Number 6, Mr Jones''. This is mainly useful when providing different
5454 format strings for different languages, whose grammars may dictate
5455 different orderings of the values being printed. To support this
5456 feature, the interface for `register_printf_handler' has changed; see
5457 the header file <printf.h> for details.
5459 * The `printf' and `scanf' families of functions now understand a new
5460 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5461 to group numbers as indicated by the locale; for `scanf' and friends, this
5462 says to accept as valid only a number with all the proper grouping
5463 separators in the right places. In the default "C" locale, numbers are
5464 not grouped; but locales for specific countries will define the usual
5465 conventions (i.e. separate thousands with `,' in the US locale).
5467 * The pgrp functions have been regularized, slightly incompatibly but much
5468 less confusingly. The core functions are now `getpgid' and `setpgid',
5469 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5470 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5471 provided for compatibility. There is no longer an incompatible `getpgrp'
5472 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5474 * The new header file <fts.h> and suite of functions simplify programs that
5475 operate on directory trees. This code comes from 4.4 BSD.
5477 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5478 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5479 NSS scheme used in glibc.
5481 * There is a new malloc debugging hook `__memalign_hook'.
5483 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5484 `unsigned int' in <sys/types.h>. These are for compatibility only and
5485 their use is discouraged.
5487 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5488 done differently, so that it works even without GNU ld.
5490 * New function `euidaccess' checks allowed access to a file like `access',
5491 but using the effective IDs instead of the real IDs.
5493 * The time zone data files have been updated for the latest and greatest
5494 local time conventions of the countries of the world.
5496 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5499 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5500 for formatting floating-point numbers. They are provided only for
5501 compatibility; new programs should use `sprintf' instead. There are
5502 also equivalent function for the `long double' floating-point type and
5503 all functions also exist in a reentrant form.
5505 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5506 functions for maintaining the login-record files (primarily of use to
5507 system programs such as `login'), and convenient functions for
5508 allocating and initializing a pseudo-terminal (pty) device.
5510 * Ulrich Drepper has contributed new support for System V style
5511 shared memory and IPC on systems that support it.
5513 * Ulrich Drepper has contributed several miscellaneous new functions found
5514 in System V: The `hsearch' family of functions provide an effective
5515 implementation of hash tables; `a64l' and `l64a' provide a very simple
5516 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5519 * Ulrich Drepper has contributed new reentrant counterparts for the
5520 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5522 * Ulrich Drepper has contributed new, highly-optimized versions of several
5523 string functions for the i486/Pentium family of processors.
5525 * Ulrich Drepper has updated the Linux-specific code, based largely
5526 on work done in Hongjiu Lu's version of GNU libc for Linux.
5527 The GNU library now supports Linux versions 2.0.10 and later,
5528 using the ELF object file format (i[3456]86-*-linux).
5530 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5532 * David Mosberger-Tang and Richard Henderson have ported the C library
5533 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5534 dynamic linking support for ELF/Alpha.
5536 * Richard Henderson contributed several Alpha optimized assembler function
5537 for arithmetic and string handling.
5539 * Ulrich Drepper has contributed a new set of message catalog functions to
5540 support multiple languages using the <libintl.h> interface, for use with
5541 his new package GNU gettext. Translation volunteers have contributed
5542 catalogs of the library's messages in Spanish, German, and Korean.
5544 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5545 program and the `catgets' function for reading the catalog files it
5546 creates. (The <libintl.h> interface is preferred; we include the
5547 <nl_types.h> interface using `catgets' only for source compatibility with
5548 programs already written to use it.)
5550 * New header file <values.h> gives SVID-compatible names for <limits.h>
5553 * Various new macros, declarations, and small header files for compatibility
5556 * New function `group_member' is a convenient way to check if a process has
5557 a given effective group ID.
5559 * When using GCC 2.7 and later, the socket functions are now declared in a
5560 special way so that passing an argument of type `struct sockaddr_in *',
5561 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5562 `struct sockaddr *' type, does not generate a type-clash warning.
5564 * New function `error' declared in header file <error.h> is a convenient
5565 function for printing error messages and optionally exiting; this is the
5566 canonical function used in GNU programs. The new functions `err', `warn',
5567 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5568 doing the same thing.
5570 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5571 POSIX.2 `glob' function to do ~ and {...} expansion.
5573 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5574 `clearenv' which is used in POSIX.9 is also available.
5576 * New function `getsid' returns session ID number on systems that support it.
5578 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5579 files <db.h> and <mpool.h> provide a rich set of functions for several
5580 types of simple databases stored in memory and in files, and <ndbm.h> is
5581 an old `ndbm'-compatible interface using the `db' functions. Link with
5582 `-ldb' to get these functions.
5584 * New macro `strdupa' copies a string like `strdup', but uses local stack
5585 space from `alloca' instead of dynamic heap space from `malloc'.
5587 * New function `strnlen' is like `strlen' but searches only a given maximum
5588 number of characters for the null terminator. `stpncpy', `strndup' and
5589 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5592 * New function `statfs' in header <sys/statfs.h>.
5594 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5595 provide convenient functions for operating on blocks of null-terminated
5598 * A new suite of functions in <utmp.h> handle all the details of reading
5599 and writing the utmp file.
5601 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5604 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5605 completely POSIX compliant and also implemented the extended functionality
5606 to handle alternate digit representation and alternate era date formats.
5608 * Ulrich Drepper provided an implementation of the `strptime' function
5609 defined in XPG4.2 which transforms a string into a `struct tm' value.
5611 * Paul Eggert provided the tzselect shell script as part of the timezone
5612 code. The shell script makes it easy to select the correct timezone
5615 * The implementation of the malloc family of functions is completely replaced
5616 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5617 The implementation uses the mmap function (if available) and it is
5618 optimized for the use in multi threaded programs.
5620 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5621 functions. This new functionality is usable by specifying a special
5622 salt string and it is compatible with implementation on *BSD systems.
5624 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5625 `getsubopt' to handle second level command line options, `bsd_signal'
5626 to access BSD style `signal' functionality, the obsolete `regexp' style
5629 * the `lchown' function is available on system which support this
5632 * The implementation of the shadow password handling function was contributed
5635 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5637 * POSIX.1g support was added. The <sys/select.h> header is available,
5638 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5639 implementation of `getaddrinfo'.
5643 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5645 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5646 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5648 * The new function `daemon' from 4.4 BSD is useful for server programs that
5649 want to put themselves in the background.
5651 * Joel Sherrill has contributed support for several standalone boards that
5652 run without an operating system.
5654 * `printf', `scanf' and friends now accept a `q' type modifier for long
5655 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5657 * All of the code taken from BSD (notably most of the math and networking
5658 routines) has been updated from the BSD 4.4-Lite release.
5660 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5662 * The new functions `getdomainname' and `setdomainname' fetch or change the
5663 YP/NIS domain name. These are system calls which exist on systems which
5666 * The time zone data files have been updated for the latest international
5669 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5670 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5674 * The C library now includes support for Sun RPC, from Sun's free
5675 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5676 are included. (There is still no support for YP.)
5678 * Tom Quinn has contributed a port of the C library to SGI machines running
5679 Irix 4 (mips-sgi-irix4).
5681 * The new `lockf' function is a simplified interface to the locking
5682 facilities of `fcntl', included for compatibility.
5684 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5686 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5688 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5691 * The error message printed by `assert' for a failed assertion now includes
5692 the name of the program (if using GNU ld) and the name of the calling
5693 function (with versions of GCC that support this).
5695 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5697 * The library now includes the <sys/mman.h> header file and memory
5698 management functions `mmap', `munmap', `mprotect', `msync', and
5699 `madvise', on systems that support those facilities.
5701 * The interface for `mcheck' has changed slightly: the function called to
5702 abort the program when an allocation inconsistency is detected now takes
5703 an argument that indicates the type of failure. The new function
5704 `mprobe' lets you request a consistency check for a particular block at
5705 any time (checks are normally done only when you call `free' or `realloc'
5708 * It is now possible to easily cross-compile the C library, building on one
5709 system a library to run on another machine and/or operating system. All
5710 you need to do is set the variable `HOST_CC' in `configparms' to the
5711 native compiler for programs to run on the machine you are building on (a
5712 few generator programs are used on Unix systems); set `CC' to the
5715 * The new function `fexecve' (only implemented on the GNU system) executes
5716 a program file given a file descriptor already open on the file.
5720 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5721 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5723 * You can set the variable `libprefix' in `configparms' to specify a prefix
5724 to be prepended to installed library files; this makes it easy to install
5725 the GNU C library to be linked as `-lgnuc' or whatever.
5727 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5728 copies a limited number of characters from a string, and returns the
5729 address of the last character written.
5731 * You no longer need to check for whether the installed `stddef.h' is
5732 compatible with the GNU C library. configure now checks for you.
5734 * You can now define a per-stream `fileno' function to convert the
5735 stream's cookie into an integral file descriptor.
5737 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5738 allocates zero bytes of storage, and returns a unique pointer which
5739 you can pass to `realloc' or `free'. The behavior is undefined if
5740 you dereference this pointer.
5742 * The C library now runs on Sony NEWS m68k machines running either
5743 NewsOS 3 or NewsOS 4.
5745 * The new `syscall' function is a system-dependent primitive function
5746 for invoking system calls. It has the canonical behavior on Unix
5747 systems, including unreliable return values for some calls (such as
5748 `pipe', `fork' and `getppid').
5750 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5751 to `EAGAIN', which is the preferred name. On systems whose kernels
5752 use two distinct codes, the C library now translates EWOULDBLOCK to
5753 EAGAIN in every system call function.
5757 * The GNU C Library Reference Manual is now distributed with the library.
5758 `make dvi' will produce a DVI file of the printed manual.
5759 `make info' will produce Info files that you can read on line using C-h i
5760 in Emacs or the `info' program.
5761 Please send comments on the manual to bug-glibc-manual@gnu.org.
5763 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5765 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5767 * Jason Merrill has contributed a port to the Sequent Symmetry running
5768 Dynix version 3 (i386-sequent-dynix).
5770 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5771 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5773 * New function `memory_warnings' lets you arrange to get warnings when
5774 malloc is running out of memory to allocate, like Emacs gives you.
5776 * The C library now contains the relocating allocator used in Emacs 19 for
5777 its editing buffers. This allocator (ralloc) minimizes allocation
5778 overhead and fragmentation by moving allocated regions around whenever it
5779 needs to. You always refer to a ralloc'd region with a "handle" (a
5780 pointer to a pointer--an object of type `void **').
5782 * There is a new `printf' format: `%m' gives you the string corresponding
5783 to the error code in `errno'.
5785 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5786 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5787 pass, the `a' modifier says to fill in a `char **' you pass with a
5790 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5791 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5792 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5794 * `mkstemp' is a traditional Unix function to atomically create and open a
5795 uniquely-named temporary file.
5799 * The standard location for the file that says what the local timezone is
5800 has changed again. It is now `/usr/local/etc/localtime' (or more
5801 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5803 * The distribution no longer contains any files with names longer than 14
5806 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5807 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5809 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5813 * The configuration process has changed quite a bit. The `configure'
5814 script is now used just like the configuration scripts for other GNU
5815 packages. The `sysdeps' directory hierarchy is much rearranged.
5816 The file `INSTALL' explains the new scheme in detail.
5818 * The header files no longer need to be processed into ANSI C and
5819 traditional C versions. There is just one set of files to install, and
5820 it will work with ANSI or old C compilers (including `gcc -traditional').
5822 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5823 MIPS DECStation running Ultrix 4.
5825 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5826 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5827 made itself into a shared library.
5829 * Yet further improved support for the i386, running 4.3 BSD-like systems
5830 (such as Mach 3 with the Unix single-server), or System V.
5832 * New function `strncasecmp' to do case-insensitive string comparison
5833 with limited length.
5835 * New function `strsep' is a reentrant alternative to `strtok'.
5837 * New functions `scandir' and `alphasort' for searching directories.
5839 * New function `setenv' is a better interface to `putenv'.
5841 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5842 function for traversing a directory tree.
5844 * The GNU obstack package is now also part of the C library.
5845 The new function `open_obstack_stream' creates a stdio stream that
5846 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5847 formatted output directly to an obstack.
5849 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5850 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5852 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5854 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5855 things to your strings.
5857 * There are some new test programs: test-fseek, testmb, and testrand.
5859 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5860 These ports are not finished, but are a good starting place for really
5861 supporting those systems.
5863 * `/etc/localtime' is now the standard location for the file that says what
5864 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5865 This follows the general principle that `/etc' is the place for all local
5866 configuration files.
5868 * The C library header files now use `extern "C"' when used by the C++
5869 compiler, so the C library should now work with C++ code.
5871 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5872 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5875 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5876 function which uses the `merge sort' algorithm, and is said to be
5877 significantly faster than the old GNU `qsort' function. Merge sort is
5878 now the standard `qsort' function. The new algorithm can require a lot
5879 of temporary storage; so, the old sorting function is called when the
5880 required storage is not available.
5882 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5883 provides the Unix `crypt' function, plus some other entry points.
5885 * The code and header files taken from 4.4 BSD have been updated with the
5886 latest files released from Berkeley.
5888 ----------------------------------------------------------------------
5889 Copyright information:
5891 Copyright (C) 1992-2020 Free Software Foundation, Inc.
5893 Permission is granted to anyone to make or distribute verbatim copies
5894 of this document as received, in any medium, provided that the
5895 copyright notice and this permission notice are preserved,
5896 thus giving the recipient permission to redistribute in turn.
5898 Permission is granted to distribute modified versions
5899 of this document, or of portions of it,
5900 under the above conditions, provided also that they
5901 carry prominent notices stating who last changed them.
5904 version-control: never